code: public VirtualMachineExtensionInner get(String resourceGroupName, String vmName, String vmExtensionName) {
          return getWithServiceResponseAsync(resourceGroupName, vmName, vmExtensionName).toBlocking().single().body();
      }
docs: The operation to get the extension.
  
  @param resourceGroupName The name of the resource group.
  @param vmName The name of the virtual machine containing the extension.
  @param vmExtensionName The name of the virtual machine extension.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the VirtualMachineExtensionInner object if successful.