for (Iterator it = DataSourcePool.global.dataSources().iterator(); it.hasNext(); ) {
Object o = it.next();
if (!(o instanceof ExpressionDataSource)) continue;
ExpressionDataSource ds = (ExpressionDataSource)o;
if (name.equals(DataInfo.getLabel(ds)) || name.equals(DataInfo.getAlias(ds))) {
ds.changeExpression(exp, node);
newSource = false;
ExpressionPanel.this.sourceTree.setSelectedValue(ds);
TreeNode tn = (TreeNode)(ExpressionPanel.this.sourceTree.getSelectionPath().getLastPathComponent());
((DefaultTreeModel)(ExpressionPanel.this.sourceTree.getModel())).nodeChanged(tn);
break;