Would love to see a trim function (right and left!) in a future Flex

[haihongren]

Is your feature request related to a problem? Please describe.

na

Feature Description

Would love to see a trim function (right and left!) in a future Flex

Describe Alternatives

value_mapper function can do this - need to use the following regex.

          value_mapper:
            field1:
              - ^\s*(.*?)\s*$=>$1

Additional context

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Really Want