docs: public int getInsertOffset(XtendTypeDeclaration container) {
  		if (container.getMembers().isEmpty()) {
  			final ICompositeNode node = NodeModelUtils.findActualNodeFor(container);
  			final ILeafNode openingBraceNode = IterableExtensions.findFirst(node.getLeafNodes(),
  					lnode -> "{".equals(lnode.getText())); //$NON-NLS-1$
  			if (openingBraceNode != null) {
  				return openingBraceNode.getOffset() + 1;
  			}
  			return node.getEndOffset();
  		}
  		final EObject lastFeature = IterableExtensions.last(container.getMembers());
  		final ICompositeNode node = NodeModelUtils.findActualNodeFor(lastFeature);
  		return node.getEndOffset();
  	}