Source

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

public function set_props( $args ) {
		$args = wp_parse_args(
			$args,
			array(
				'render_callback' => null,
			)
		);

		$args['name'] = $this->name;

		/**
		 * Filters the arguments for registering a block type.
		 *
		 * @since 5.5.0
		 *
		 * @param array  $args       Array of arguments for registering a block type.
		 * @param string $block_type Block type name including namespace.
		 */
		$args = apply_filters( 'register_block_type_args', $args, $this->name );

		foreach ( $args as $property_name => $property_value ) {
			$this->$property_name = $property_value;
		}
	}