def make_value_from_datastore(self, value):
    if value is None:
      return None
    return BlobInfo(value)
Find notes in the given document and mark them up as such.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/blobstore/blobstore.py/BlobReferenceProperty.make_value_from_datastore--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/lore/tree.py/notes