code: public ServiceFuture<DiagnosticCategoryInner> getSiteDiagnosticCategorySlotAsync(String resourceGroupName, String siteName, String diagnosticCategory, String slot, final ServiceCallback<DiagnosticCategoryInner> serviceCallback) {
          return ServiceFuture.fromResponse(getSiteDiagnosticCategorySlotWithServiceResponseAsync(resourceGroupName, siteName, diagnosticCategory, slot), serviceCallback);
      }
docs: Get Diagnostics Category.
  Get Diagnostics Category.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param siteName Site Name
  @param diagnosticCategory Diagnostic Category
  @param slot Slot Name
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object