public Set<TableDescriptor> getTableDescriptors() {
    return Collections.unmodifiableSet(new HashSet<>(tableDescriptors.values()));
  }
Get all the {@link TableDescriptor}s in this application

@return an immutable set of {@link TableDescriptor}s
samza-core/src/main/java/org/apache/samza/application/descriptors/ApplicationDescriptorImpl.java