This function is only applicable to reshape data that was
reshaped to wide via Access specification in RESHAPE columns.
Arguments
- dt
 An output dataset from
do_reshape_wide()- respec
 Reshape specification with
idandvaluevariables. This is the output fromget_reshape_wide_spec()
See also
Other reshape functions:
do_reshape(),
do_reshape_rename_col(),
do_reshape_wide(),
get_reshape_id_val(),
get_reshape_wide_spec()
