| retrieve.async.result.file | R Documentation | 
Retrieves the output file from an asynchronous job if it exists. The file is copied to the working directory, so that OpenCPU can expose it on the webservice.
retrieve.async.result.file(jobID, ext = "png")
| jobID | the ID of the job. | 
| ext | the file extension. Defaults to "png". | 
TRUE if successful, otherwise FALSE.
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