Get a dictionary serialization of the object to convert into a Json
        object.

        Returns
        -------
        dict

def to_dict(self):
        """Get a dictionary serialization of the object to convert into a Json
        object.

        Returns
        -------
        dict
        """
        doc = {
            'filename' : self.filename,
            'mimeType' : self.mime_type
        }
        # Add path if present
        if self.filename != self.path:
            doc['path'] = self.path
        return doc