suppressMultipleContextValues will produces unique values. If argument (including empty string or blank) existed more than one time will become ResultList.SUPPRESS.
Source message type and target message type:

Source data and target data:

mapping for field row:
If same value existed more than 1 time, will be suppressed.

mapping for field col1: 1 to 1 direct mapping.

UDFNodePool – suppressMultipleContextValues
