@Override
  public String toString() {
    return "Variable{" +
           "myName='" + myName + '\'' +
           ", myAlwaysStopAt=" + myAlwaysStopAt +
           ", myExpressionString='" + myExpressionString + '\'' +
           ", myDefaultValueString='" + myDefaultValueString + '\'' +
           ", mySkipOnStart=" + mySkipOnStart +
           '}';
  }
@Override
  public String toString()