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Extract a WorkbenchScreenState from the provided file.
Return
A WorkbenchScreenState populated with data from the file or an empty WorkbenchScreenState if any occur
The file does not exist
The file is a directory
An exception occurs during data extraction.
Parameters
file
The file to extract data from.
Answer a WorkbenchScreenState from the provided JSONObject.
Return
The WorkbenchScreenState.
Parameters
obj
The JSONObject to extract data from.