public function isPreColorized( $column ) {
		if ( is_bool( $this->_pre_colorized ) ) {
			return $this->_pre_colorized;
		}
		if ( is_array( $this->_pre_colorized ) && isset( $this->_pre_colorized[ $column ] ) ) {
			return $this->_pre_colorized[ $column ];
		}
		return false;
	}