# OpenModelCallback

class `cee.ug.``OpenModelCallback`()

  Callback that is invoked when the opening of a model is complete. If there were no errors, the `ModelDirectory` will have been populated once this is called.

  If you need to do any async calls or want to do something else before the streaming starts, return POSTPONE_STREAMING from this callback. When you are done and would like the model to start the initial streaming, call the startPostponedStreaming() function.

  If you return nothing or START_STREAMING the streaming of the model will start immediately.

  Note: DO NOT do any async calls in the callback unless you return POSTPONE_STREAMING!

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