DrmSessionManager.DrmSessionReference (ExoPlayer library)

Enclosing interface:

DrmSessionManager
```
public static interface DrmSessionManager.DrmSessionReference
```
Represents a single reference count of a DrmSession, while deliberately not giving access to the underlying session.

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  static DrmSessionManager.DrmSessionReference EMPTY
  A reference that is never populated with an underlying DrmSession.
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void release()
  Releases the underlying session at most once.

- Field Detail
  - EMPTY
```
static final DrmSessionManager.DrmSessionReference EMPTY
```
    A reference that is never populated with an underlying DrmSession.
- Method Detail
  - release
```
void release()
```
    Releases the underlying session at most once.
    Can be called from any thread. Calling this method more than once will only release the underlying session once.