@utilities.arguments_not_none<EOL><INDENT>def match_any_grade_entry(self, match):<DEDENT>
raise errors.Unimplemented()<EOL>
Matches gradebook columns with any grade entry assigned.

        arg:    match (boolean): ``true`` to match columns with any
                grade entry, ``false`` to match columns with no grade
                entries
        *compliance: mandatory -- This method must be implemented.*