Source

File: wp-includes/class-wp-block-list.php

public function __construct( $blocks, $available_context = array(), $registry = null ) {
		if ( ! $registry instanceof WP_Block_Type_Registry ) {
			$registry = WP_Block_Type_Registry::get_instance();
		}

		$this->blocks            = $blocks;
		$this->available_context = $available_context;
		$this->registry          = $registry;
	}