addTargetFullName() should throw warning when PROBEID not present #22
Description
A requirement of addTargetFullName() is that a "PROBEID" column is present in the input dataset. If it is not present, the function still runs, but returns an empty (0-row) data frame.
A warning or error message should be thrown when this happens, so the user doesn't (incorrectly) conclude that no Target IDs were identified, based on the function output.