Type type = createType(node, attrMap, false, null);
String name = getVariableName(attrMap, "name", false);
Expression expr = attrMap.getExprValue("expr", null);
Expression content = getCollapsableContent(attrMap);
if (type != null && name != null && expr != null) {
output.accumulate(new AbbrExpression(node, type, name, expr, content));
}
return null;
}