has Key System
Checks if the source has the specified key system.
Return
true if the source has the specified key system, otherwise false.
Parameters
key System
the unique identifier of the key systems, such as WIDEVINE_KEY_SYSTEM.
Checks if the source has the specified key system.
true if the source has the specified key system, otherwise false.
the unique identifier of the key systems, such as WIDEVINE_KEY_SYSTEM.