Use of trim function within a BuildOp

[fridge]

Hi, I have a simple buildop that uses a bit of C++ to manipulate a APT_String

I am trying to work out how to trim the string of whitespace before I do my munging on it and cant for the life of me work out the proper syntax

tried various combinations such as

tssid_strip=INPUT.TSSID.trimWhitespace();


but either get name lookup on trimWhitespace failed, or incorrect parameters etc

Any pointers gratefully recieved