def _apply_cell_filters(self, context):
self.setattrs(_is_unpermitted_fields_set=True)<EOL>for perm, fields in self.Meta.field_permissions.items():<EOL><INDENT>if not context.has_permission(perm):<EOL><INDENT>self._unpermitted_fields.extend(fields)<EOL><DEDENT><DEDENT>return self._unpermitted_fields<EOL>
Applies the field restrictions based on the
 return value of the context's "has_permission()" method.
 Stores them on self._unpermitted_fields.

Returns:
    List of unpermitted fields names.