A ConnectionVariable identifes a variable used as a connection buffer.
conformsTo 
				
					VariableDeclaration
				
			
Attributes
				
AddStatement : Bag(qvtimperative::AddStatement)
			
				
AppendParameterBinding : Bag(qvtimperative::AppendParameterBinding)
			
				
GuardParameterBinding : Bag(qvtimperative::GuardParameterBinding)