# Is valid delegated media gid > Supported in: Batch, Faster, Streaming Returns true if the input is a valid gotham delegated media gid. Check gotham's delegated media rtfm for more details. **Expression categories:** Boolean ## Declared arguments * **Expression:** String to check is a valid gotham delegated media.
*Expression\* **Output type:** *Boolean* ## Examples ### Example 1: Base case **Argument values:** * **Expression:** hello **Output:** false *** ### Example 2: Base case **Argument values:** * **Expression:** ri.gotham-delegated-media.12345678-1234-1234-1234-123456789012.testaudiotype.testlocator **Output:** true *** ### Example 3: Null case **Argument values:** * **Expression:** *null* **Output:** *null* ***