NMRWish Built-In TCL Functions
gdbTest: Test whether a GDB cell (value at a given row and column) has data or is empty.

Get/Test the value of cells by their variables:
gdbTest entry varNameOrHandleList [-notrim]
Notes:
1. No value is returned for variables which are
not valid or not found in the given entry.
2. Use back-quoted variable names to allow
matching by regular expression (i.e. `HN_.*`).

Frank Delaglio, Ph.D.