code: def assertStructIsInline(self, obj):
          
  
          N.enforce_number(obj, N.UOffsetTFlags)
          if obj != self.Offset():
              msg = ("flatbuffers: Tried to write a Struct at an Offset that "
                     "is different from the current Offset of the Builder.")
              raise StructIsNotInlineError(msg)
docs: Structs are always stored inline, so need to be created right
          where they are used. You'll get this error if you created it
          elsewhere.