check_update_permission example

    public function get_item_permissions_check( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        if ( 'edit' === $request['context'] && $post && ! $this->check_update_permission( $post ) ) {
            return new WP_Error(
                'rest_forbidden_context',
                __( 'Sorry, you are not allowed to edit this post.' ),
                array( 'status' => rest_authorization_required_code() )
            );
        }

        if ( $post && ! empty( $request['password'] ) ) {
            // Check post password, and return error if invalid.             if ( ! hash_equals( $post->post_password, $request['password'] ) ) {
                return new WP_Error(
                    

    public function get_item_permissions_check( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        if ( 'edit' === $request['context'] && $post && ! $this->check_update_permission( $post ) ) {
            return new WP_Error(
                'rest_forbidden_context',
                __( 'Sorry, you are not allowed to edit this global style.' ),
                array( 'status' => rest_authorization_required_code() )
            );
        }

        if ( ! $this->check_read_permission( $post ) ) {
            return new WP_Error(
                'rest_cannot_view',
                __( 'Sorry, you are not allowed to view this global style.' ),