You can comment out any line in a script by using two forward slashes // at the beginning of the line. If a line spans into multiple lines, you must comment out each line separately. For example:
//execute datasynchronization // parameters(DataSynchronizationName, DataTransformationOperator, DataTransformationValue, FileName, // ValidateOnly, WaitForCompletion) // values('CommaSync3', '*', '1.2345', '', 'false', 'true');