This function has been deprecated.

wpmu_menu()

Outputs the WPMU menu.

Source

File: wp-admin/includes/ms-deprecated.php 

function wpmu_menu() {
	_deprecated_function(__FUNCTION__, 'WP-3.0.0' );
	// Deprecated. See https://core.trac.wordpress.org/ticket/11763.
}

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Changelog

Changelog
Version Description
3.0.0 Introduced. This function has been deprecated.