rvices-api-credentials.json")
           .build(),
       executionContext = PDFServicesSdk.ExecutionContext.create(credentials),
       DeletePages = PDFServicesSdk.DeletePages,
       deletePagesOperation = DeletePages.Operation.createNew(),
       pageRanges = new PDFServicesSdk.PageRanges();

 deletePagesOperation.setInput( PDFServicesSdk.FileRef.createFromLocalFile('~/Documents/deletePagesOperationInput.pdf',
 	DeletePages.SupportedSourceFormat.pdf));
 pageRanges.addSinglePage(1);
 deletePagesOperation