WhyAutoLayout_rgbviews_dhconstraintbuilder.swift

// DHConstraintBuilder

//1
view_cb.addConstraints(() |-^ greenView_cb ^-^ 15.5 ^-^ redView_cb ^-| ()).H

//2
view_cb.addConstraints(() |-^ blueView_cb ^-| ()).H
		
//3
view_cb.addConstraints(() |-^ greenView_cb ^-^ blueView_cb ^-| ()).V

//4
view_cb.addConstraints(() |-^ redView_cb ^-^ blueView_cb).V

//5
view_cb.addConstraints(greenView_cb.lengthEqual(to: redView_cb)).H
//6
view_cb.addConstraints(greenView_cb.lengthEqual(to: blueView_cb)).V