How to setup an environment for experiment

(LePage named: 'How to setup an environment for experiment')
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			string: '# 1. Load a package';
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					string: 'The file is compiled as a package and currently uploaded to gist, not as a Github repo.  Download and manually import it.';
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					code: 's := ZnClient new
		get: ''https://gist.githubusercontent.com/iriyak/ecd5231cd8d67172270082bc7d53f2a6/raw/ad6b9971592072ed3ed75903aaf3b076d1261e15/KIExtensionsForGToolkit4P3.st''.
CodeImporter evaluateString: s';
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					string: 'You can see a RPackage (KIExtensionsForGToolkit4P3) after successful installation.';
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					code: 'RPackageOrganizer default packageNamed: #KIExtensionsForGToolkit4P3';
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			string: '#2. Apply a change to existing codebases';
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					string: 'As of now this package needs to patch to existing codebases and I prepared a pharo rewrite snippet so that you can review each change before accepting.  Two changes should be proposed.  Accept changes when you''re fine to proceed.';
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			addSnippet: (LePharoRewriteSnippet new
					search: 'P3ClientLoginPane new';
					replace: 'P3ClientLoginPane2 new';
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					string: 'Register the startup script of {{gtMethod:name=GtP3ConnectionManager class>>startUp}} to {{gtClass:name=GtSessionManager}}. ';
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			addSnippet: (LePharoSnippet new
					code: 'GtP3ConnectionManager initialize';
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			addSnippet: (LeTextSnippet new
					string: 'You can check regisration is successful.  Open a singleton of {{gtClass:name=GtSessionManager}} and drill down to a ClassSessionHandler(GtP3ConnectionManager) in Prioritized List view from Network Cateogry in Categories view and double-click the record to inspect which part of the code is registered.';
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					code: 'GtSessionManager default';
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					string: 'Done!  It is now ready for testing!';
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			string: '#3. What to do first?';
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					string: '##3.1. Overview';
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							string: 'We first open a singleton of {{gtClass:name=P3ConfigHolder}} in a separate window. Let''s establish a PostgreSQL connection and see how book keeping goes over Configs custom view.   Once enough entries are kept, we switch the database connection by clicking on "Save" button instead of interacting with {{gtClass:name=LePostgresqlLoginSnippet}}.';
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					string: '##3.2. Inspect a singleton of P3ConfigHolder';
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							string: 'Open an inspector of P3ConfigHolder class.  Configs custom view shows the current configurations that the singleton holds.  The view actually borrows the logic for #gtItemsView: for Dictionary and the right click allows to manipulate a key or a value of each association.';
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					addSnippet: (LePharoSnippet new
							code: 'P3ConfigHolder';
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			addSnippet: (LeTextSnippet new
					string: '##3.3. Inspect a singleton of GtP3ConnectionManager';
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							string: 'Open an inspector of GtP3ConnectionManager class.  Connection custom view shows the current P3Client instance object.  As GtP3ConnectionManager maintains a single connection, you can see just one record.';
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					addSnippet: (LePharoSnippet new
							code: 'GtP3ConnectionManager';
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					string: '##3.3. Establish a PostgreSQL connection';
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							string: 'Open a new LePage and establish a PostgreSQL connection with use of PostgreSQL snippet or PostgreSQL login snippet.  You can see a name field and assign it to the set of configuration.  After clicking on "Accept" button, P3ConfigHolder keeps recording.';
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					string: '##3.4. Switch the database connection';
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							string: 'Once enought entires are kept in P3ConfigHolder, let''s move to Configs view of P3ConfigHolder and click on "Save" button to switch the database connection.  This operation always involving closing the existing connection and establishing a new connection with the set of configurations associated with the name selected.';
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					addSnippet: (LePharoSnippet new
							code: 'P3ConfigHolder';
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					addSnippet: (LeTextSnippet new
							string: 'The PostgreSQL snippet and PostgreSQL login snippets refer to the same P3Client that was given by GtP3ConnectionManager and hence the change is spread across snippet.  In other words globally.';
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			string: '#4. Roll back the changes to the original state';
			addSnippet: (LeTextSnippet new
					string: 'The below snippet aims to roll back to the original state for th existing codebase. The search actually hits a method found in {{gtPackage:name=KIExtensionsForGToolkit4P3}} which is not supposed to replace, but go ahead.  That package will be anyway removed as part of rolling back.';
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			addSnippet: (LePharoRewriteSnippet new
					search: 'P3ClientLoginPane2 new';
					replace: 'P3ClientLoginPane new';
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			addSnippet: (LeTextSnippet new
					string: 'Close all the LePages that contain PostgreSQL snippet or PostgreSQL login snippets.  It refers to the instance of P3ClientLoginPange2.  There is no need to remove these snippets from the LePage.  Closing the page is sufficient.';
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					string: 'Unregister the startup script of {{gtMethod:name=GtP3ConnectionManager class>>startUp}} from {{gtClass:name=GtSessionManager}}. ';
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			addSnippet: (LePharoSnippet new
					code: 'GtSessionManager default unregisterClassNamed: GtP3ConnectionManager';
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			addSnippet: (LeTextSnippet new
					string: 'Remove the installed package from the  System.';
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			addSnippet: (LePharoSnippet new
					code: '(RPackageOrganizer default packageNamed: #KIExtensionsForGToolkit4P3) removeFromSystem';
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	addSnippet: (LeTextSnippet new
			string: '#In Closing';
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					string: 'That''s all of the current progress.';
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			addSnippet: (LeTextSnippet new
					string: 'Hopes you enjoy exploring data analysis (EDA) with PostgreSQL snippet and PostgreSQL login snippet!';
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