REPLACE-GDR : WFFOP

REPLACE-GDR is a wff operation.
Replace the 'argument' part of an application non-destructively.
 
The calling scheme for REPLACE-GDR is:

(REPLACE-GDR GWFF NEWGDRWFF)
"GWFF" "GWFF"


The result is of type GWFF.

The arguments have the following meaning:
GWFF : gwff
NEWGDRWFF : New gdr

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