WP_Block_Supports::register( string $block_support_name, array $block_support_config )

Source

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

public function register( $block_support_name, $block_support_config ) {
		$this->block_supports[ $block_support_name ] = array_merge(
			$block_support_config,
			array( 'name' => $block_support_name )
		);
	}