code: public BuildStepInner beginCreate(String resourceGroupName, String registryName, String buildTaskName, String stepName, BuildStepProperties properties) {
          return beginCreateWithServiceResponseAsync(resourceGroupName, registryName, buildTaskName, stepName, properties).toBlocking().single().body();
      }
docs: Creates a build step for a build task.
  
  @param resourceGroupName The name of the resource group to which the container registry belongs.
  @param registryName The name of the container registry.
  @param buildTaskName The name of the container registry build task.
  @param stepName The name of a build step for a container registry build task.
  @param properties The properties of a build step.
  @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 BuildStepInner object if successful.