List of buckets that have been modified in the current scope.
		 * When the scope is closed these buckets are popped, returning the 
		 * symbol table to the state it was in before the scope was opened.
List of buckets that have been modified in the current scope.
		 * When the scope is closed these buckets are popped, returning the 
		 * symbol table to the state it was in before the scope was opened. | CImperativeSymbolTable.java