page.writeStart("label", "for", page.createId());
page.writeHtml("Fields");
page.writeEnd();
page.writeEnd();
page.writeStart("div", "class", "inputSmall");
page.writeStart("select",
"name", FIELDS_PARAMETER,
"multiple", "multiple");
for (ObjectField field : allFields) {
if (field.as(ToolUi.class).isHidden()) {