st credentials = PDFServicesSdk.Credentials.serviceAccountCredentialsBuilder()
           .fromFile("pdfservices-api-credentials.json")
           .build(),
       executionContext = PDFServicesSdk.ExecutionContext.create(credentials),
       OCR = PDFServicesSdk.OCR,
       ocrOperation = OCR.Operation.createNew(),
       input = PDFServicesSdk.FileRef.createFromLocalFile('test/resources/ocrInput.pdf', OCR.SupportedSourceFormat.pdf);

 ocrOperation.setInput(input);

 ocrOperation.execute(executionContext)
