WP_REST_Block_Patterns_Controller::get_items() WordPress Method

	public function get_items( $request ) {
		if ( ! $this->remote_patterns_loaded ) {
			// Load block patterns from w.org.
			_load_remote_block_patterns(); // Patterns with the `core` keyword.
			_load_remote_featured_patterns(); // Patterns in the `featured` category.
			_register_remote_theme_patterns(); // Patterns requested by current theme.

			$this->remote_patterns_loaded = true;
		}

		$response = array();
		$patterns = WP_Block_Patterns_Registry::get_instance()->get_all_registered();
		foreach ( $patterns as $pattern ) {
			$prepared_pattern = $this->prepare_item_for_response( $pattern, $request );
			$response[]       = $this->prepare_response_for_collection( $prepared_pattern );
		}
		return rest_ensure_response( $response );
	}