check_no_multiple_selection: Checks that the extract_input specification does not allow multiple
selection
Description
![[Stable]](figures/lifecycle-stable.svg?package=teal.transform&version=0.6.0)
Usage
check_no_multiple_selection(extract_input)
Value
Raises an error when check fails, otherwise, it returns NULL, invisibly.
Arguments
- extract_input
(list or NULL) a list of data_extract_spec
Details
Stops if condition not met.