@classmethod<EOL><INDENT>def _validate_options(cls, options):<DEDENT>
for opt1, opt2 initertools.permutations(cls.BASE_ERROR_SELECTION_OPTIONS, <NUM_LIT:2>):<EOL><INDENT>if getattr(options, opt1) and getattr(options, opt2):<EOL><INDENT>log.error('<STR_LIT>'<EOL>'<STR_LIT>'.format(opt1, opt2))<EOL>return False<EOL><DEDENT><DEDENT>if options.convention and options.convention not in conventions:<EOL><INDENT>log.error("<STR_LIT>"<EOL>.format(options.convention,<EOL>'<STR_LIT:U+002CU+0020>'.join(conventions.keys())))<EOL>return False<EOL><DEDENT>return True<EOL>
Validate the mutually exclusive options.

        Return `True` iff only zero or one of `BASE_ERROR_SELECTION_OPTIONS`
        was selected.