```
public abstract class FileId
extends java.lang.Object
```
Opaque file identifiers, which are typically a long or a string-based ID. File IDs can be used as keys of a map.

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static FileId`	`of(long fileId)`	Gets a long-based file ID.
`static FileId`	`of(java.lang.String fileId)`	Gets a String-based file ID.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Class FileId