code: @BetaApi
    public final Operation resizeRegionDisk(
        ProjectRegionDiskName disk, RegionDisksResizeRequest regionDisksResizeRequestResource) {
  
      ResizeRegionDiskHttpRequest request =
          ResizeRegionDiskHttpRequest.newBuilder()
              .setDisk(disk == null ? null : disk.toString())
              .setRegionDisksResizeRequestResource(regionDisksResizeRequestResource)
              .build();
      return resizeRegionDisk(request);
    }
docs: Resizes the specified regional persistent disk.
  
  <p>Sample code:
  
  <pre><code>
  try (RegionDiskClient regionDiskClient = RegionDiskClient.create()) {
  ProjectRegionDiskName disk = ProjectRegionDiskName.of("[PROJECT]", "[REGION]", "[DISK]");
  RegionDisksResizeRequest regionDisksResizeRequestResource = RegionDisksResizeRequest.newBuilder().build();
  Operation response = regionDiskClient.resizeRegionDisk(disk, regionDisksResizeRequestResource);
  }
  </code></pre>
  
  @param disk Name of the regional persistent disk.
  @param regionDisksResizeRequestResource
  @throws com.google.api.gax.rpc.ApiException if the remote call fails