public long getId() {
    return thread.getId();
  }
Returns the identifier of this {@code AsyncInvocation}'s thread. The thread ID is a positive
<tt>long</tt> number generated when this thread was created. The thread ID is unique and
remains unchanged during its lifetime. When a thread is terminated, this thread ID may be
reused.

@return this {@code AsyncInvocation}'s thread's ID.
geode-dunit/src/main/java/org/apache/geode/test/dunit/AsyncInvocation.java