code: @Override
      public <T> Future<T> execute(final Executable<T> executable) {
          final Promise<T> promise = Promise();
          return execute(promise, () -> {
              try {
                  executable.execute(promise);
                  // if the implementation didn't respond to the Promise we mark it as a failure.
                  if (!promise.isCompleted()) {
                      promise.failure(new IllegalStateException("No response was provided by the Promise"));
                  }
              } catch (Exception ex) {
                  promise.failure(ex);
              }
          });
      }
docs: /*
  (non-Javadoc)
  
  @see com.ericsson.concurrent.Executor#execute(com.ericsson.concurrent.Executable)