columns.add(new ColumnConfig("j:firstName", Messages.get("org.jahia.admin.firstName.label", "First name"), 140));
// columns.add(new ColumnConfig("siteName", "Site name", 80));
columns.add(new ColumnConfig("provider", Messages.get("column.provider.label", "Provider"), 80));
// columns.add(new ColumnConfig("email", "Email", 100));
ColumnModel cm = new ColumnModel(columns);
final PagingToolBar toolBar = new PagingToolBar(15);
toolBar.bind(loader);
userGrid = new Grid<GWTJahiaUser>(store, cm);