WP_Widget_Block::update( array $new_instance, array $old_instance )

Source

File: wp-includes/widgets/class-wp-widget-block.php

public function update( $new_instance, $old_instance ) {
		$instance = array_merge( $this->default_instance, $old_instance );

		if ( current_user_can( 'unfiltered_html' ) ) {
			$instance['content'] = $new_instance['content'];
		} else {
			$instance['content'] = wp_kses_post( $new_instance['content'] );
		}

		return $instance;
	}