@Override public String toString(){
  if (dimension != -1) {
    return paramId.toString() + "[" + dimension+ "]";
  }
 else {
    return paramId.toString();
  }
}

@ Override public String toString ( ) { if ( dimension != - 1 ) { return paramId . toString ( ) + "[" + dimension + "]" ; } else { return paramId . toString ( ) ; } }
returns a string representation of the stochastic parameter
