code: public ServiceFuture<RoleDefinitionInner> getByIdAsync(String roleDefinitionId, final ServiceCallback<RoleDefinitionInner> serviceCallback) {
          return ServiceFuture.fromResponse(getByIdWithServiceResponseAsync(roleDefinitionId), serviceCallback);
      }
docs: Gets a role definition by ID.
  
  @param roleDefinitionId The fully qualified role definition ID. Use the format, /subscriptions/{guid}/providers/Microsoft.Authorization/roleDefinitions/{roleDefinitionId} for subscription level role definitions, or /providers/Microsoft.Authorization/roleDefinitions/{roleDefinitionId} for tenant level role definitions.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object