WriteStreamView is a view enum that controls what details
about a write stream should be returned.
Values:
WRITE_STREAM_VIEW_UNSPECIFIED (0):
The default / unset value.
BASIC (1):
The BASIC projection returns basic metadata
about a write stream. The basic view does not
include schema information. This is the default
view returned by GetWriteStream.
FULL (2):
The FULL projection returns all available
write stream metadata, including the schema.
CreateWriteStream returns the full projection of
write stream metadata.