ample Usage:</p>
<pre class="prettyprint">
<code>
 const credentials = PDFServicesSdk.Credentials.serviceAccountCredentialsBuilder()
           .fromFile("pdfservices-api-credentials.json")
           .build(),
       executionContext = PDFServicesSdk.ExecutionContext.create(credentials),
       ExportPDFToImages = PDFServicesSdk.ExportPDFToImages,
       exportPDFToImages = ExportPDFToImages.Operation.createNew(ExportPDFToImages.SupportedTargetFormats.JPEG),
       input = PDFServicesSdk.FileRef.createFrom