protected function _doCompareFieldPresence($one, $two, $fixtureClass, $message, $fixtureTable) {
		$diff = array_diff_key($one, $two);
		if (!empty($diff)) {
			$this->warn(sprintf($message, $fixtureClass));
			foreach ($diff as $missingField => $type) {
				$this->out(' * ' . $missingField);
			}
			$this->out($this->nl(0));
			$this->_issuesFound[] = $fixtureTable;
		}
	}