public void addField(FieldInfo finfo) throws DuplicateMemberException {
  testExistingField(finfo.getName(),finfo.getDescriptor());
  fields.add(finfo);
}

public void addField ( FieldInfo finfo ) throws DuplicateMemberException { testExistingField ( finfo . getName ( ) , finfo . getDescriptor ( ) ) ; fields . add ( finfo ) ; }
appends a field to the class .
