public function get_fields( $section = null ) {
		if ( ! $section ) {
			return $this->get_all_fields();
		}

		if ( ! isset( $this->fields[ $section ] ) ) {
			return array();
		}

		$non_priority_fields = array();
		$priority_fields     = array();

		foreach ( $this->fields[ $section ] as $field_id => $field ) {
			if ( ! isset( $field['priority'] ) || is_null( $field['priority'] ) ) {
				$non_priority_fields[ $field_id ] = $field;
			} else {
				$priority_fields[ $field_id ] = $field;
			}
		}

		uasort( $priority_fields, array( $this, 'sort_by_priority' ) );

		$fields = $priority_fields + $non_priority_fields;

		return $fields;
	}