docstr: The media type of the sample.
code: def media_type(self):
      """The media type of the sample."""
      return self._media_type
  
imports: import os
  from bson import ObjectId
  from fiftyone.core.document import Document, DocumentView
  import fiftyone.core.frame
  import fiftyone.core.frame_utils
  import fiftyone.core.labels
  import fiftyone.core.metadata
  import fiftyone.core.media
  import fiftyone.core.odm
  import fiftyone.core.utils
  from fiftyone.core.singletons import SampleSingleton
label_desc: Use image node_id 9 for calling the _SampleMixin obj's underlying member method code with example usage: obj.media_type() and returns: self