redentials = PDFToolsSdk.Credentials.serviceAccountCredentialsBuilder()
           .fromFile("pdftools-api-credentials.json")
           .build(),
       executionContext = PDFToolsSdk.ExecutionContext.create(credentials),
       CreatePDF = PDFToolsSdk.CreatePDF,
       createPDFOperation = CreatePDF.Operation.createNew(),
       input = PDFToolsSdk.FileRef.createFromLocalFile('test/resources/createPDFInput.docx', CreatePDF.SupportedSourceFormat.docx);

 createPDFOperation.setInput(input);

 createPDFOpera