$media_item
$media_item
Required. The [MediaItem][google.photos.types.MediaItem] to update.
The media item's id
field is used to identify the media item to be
updated.
The media item's description
field is used to set the new media item
description.
Generated from protobuf field .google.photos.types.MediaItem media_item = 1 [(.google.api.field_behavior) = REQUIRED];