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Checks whether the provided export directory could contain a SavedModel.

Note that the method does not load any data by itself. If the method returns false, the export directory definitely does not contain a SavedModel. If the method returns true, the export directory may contain a SavedModel but provides no guarantee that it can be loaded.

export_dir Absolute string path to possible export location. For example, '/my/foo/model'.

True if the export directory contains SavedModel files, False otherwise.