private String processButtonCallout(WButtonEditor button){
  GridField field=curTab.getField(button.getColumnName());
  return curTab.processCallout(field);
}

private String processButtonCallout ( WButtonEditor button ) { GridField field = curTab . getField ( button . getColumnName ( ) ) ; return curTab . processCallout ( field ) ; }
process callout ( s ) . < p > the callout is in the string of " class . method ; class . method ; " if there is no class name , i . e . only a method name , the class is regarded as calloutsystem . the class needs to comply with the interface callout .
