public function get_field_schema() {
		$fields = $this->get_registered_fields();

		$schema = array(
			'description' => __( 'Meta fields.' ),
			'type'        => 'object',
			'context'     => array( 'view', 'edit' ),
			'properties'  => array(),
		);

		foreach ( $fields as $key => $args ) {
			$schema['properties'][ $key ] = $args['schema'];
		}

		return $schema;
	}