protected function make_fields_validation() {
		foreach ( $this->fields as $key => $field ) {
			if ( $this->maybe_skip_field( $field ) ) {
				continue;
			}

			if ( $rules = $field->get_option( 'validate' ) ) {
				$attributes = ( new Rules_Parser( $field ) )->parse( $rules );
				$field->set_attribute( $attributes );
			}
		}
	}