ErrorTreeElement (@Nullable String groupName, Navigatable navigatable, @NotNull ErrorTreeElementKind kind, final String[] message, final Object data, String exportText, String rendererTextPrefix, VirtualFile file) { if (groupName == null) { return addSimpleMessageElement(new NavigatableMessageElement(kind, null, message, navigatable, exportText, rendererTextPrefix)); } synchronized (myLock) { List<NavigatableMessageElement> elements = myGroupNameToMessagesMap.get(groupName); if (elements == null) { elements = new ArrayList<>(); myGroupNameToMessagesMap.put(groupName, elements); } NavigatableMessageElement element = new NavigatableMessageElement( kind, getGroupingElement(groupName, data, file), message, navigatable, exportText, rendererTextPrefix ); elements.add(element); return element; } }