code: private StringBuilder getLabelExpression(Set<RemoteLabel> remoteLabels) {
          StringBuilder labels = new StringBuilder();
          for (RemoteLabel remoteLabel : remoteLabels) {
              labels.append(':').append(remoteLabel.getName());
          }
          return labels;
      }
docs: Creates an expression for adding labels, e.g. ":Person:Customer".
  
  @param remoteLabels
  The labels.
  @return The expression.