protected function get_formatter( &$assoc_args ) {

		if ( ! empty( $assoc_args['fields'] ) ) {
			if ( is_string( $assoc_args['fields'] ) ) {
				$fields = explode( ',', $assoc_args['fields'] );
			} else {
				$fields = $assoc_args['fields'];
			}
		} else {
			$fields = $this->obj_fields;
		}
		return new Formatter( $assoc_args, $fields, $this->obj_type );
	}