code: public ManagedInstanceKeyInner get(String resourceGroupName, String managedInstanceName, String keyName) {
          return getWithServiceResponseAsync(resourceGroupName, managedInstanceName, keyName).toBlocking().single().body();
      }
docs: Gets a managed instance key.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param managedInstanceName The name of the managed instance.
  @param keyName The name of the managed instance key to be retrieved.
  @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 ManagedInstanceKeyInner object if successful.