code: @Override
      public boolean isNullable() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.entry(tc, "isNullable");
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.exit(tc, "isNullable", true);
          }
          return true;
      }
docs: {@inheritDoc}