WP_Importer::get_page( string $url, string $username = '', string $password = '', bool $head = false )

	public function get_page( $url, $username = '', $password = '', $head = false ) {
		// Increase the timeout
		add_filter( 'http_request_timeout', array( $this, 'bump_request_timeout' ) );

		$headers = array();
		$args = array();
		if ( true === $head )
			$args['method'] = 'HEAD';
		if ( !empty( $username ) && !empty( $password ) )
			$headers['Authorization'] = 'Basic ' . base64_encode( "$username:$password" );

		$args['headers'] = $headers;

		return wp_safe_remote_request( $url, $args );
	}