Global environment class

Environment.swift

class ArbitraryConfigurationData {
	// content units references
}

extension Environment {
	class func bootstrap(with configuration: ArbitraryConfigurationData) {
		Environment.shared = Environment(with: configuration)
	}
}

class Environment {
	static private(set) var shared: Environment!
	
	let config: ArbitraryConfigurationData
	
	private init(with configuration: ArbitraryConfigurationData) {
		config = configuration
	}
}