void (@NotNull Collection<TypeModel> list, @NotNull @Nls String separator) { boolean first = true; for (TypeModel t : list) { if (!first) { if (separator.equals(", ")) { add(styled(separator, PyHighlighter.PY_COMMA)); } else if (separator.equals(" | ")) { add(styled(separator, PyHighlighter.PY_OPERATION_SIGN)); } else { add(escaped(separator)); } } else { first = false; } t.accept(this); } }