public void setQualifier(IEOQualifier _qualifier) { IEOQualifier oldQualifier = myQualifier;
public void setQualifier(Node _qualifier) { Node oldQualifier = myQualifier;
  public void setQualifier(IEOQualifier _qualifier) {    IEOQualifier oldQualifier = myQualifier;    myQualifier = _qualifier;    firePropertyChange(EOFetchSpecification.QUALIFIER, oldQualifier, myQualifier);  }