void (final @NotNull PyReferenceExpression node) { String referencedName = node.getReferencedName(); if (PyNames.NONE.equals(referencedName)) { //noinspection DialogTitleCapitalization getHolder().newAnnotation(HighlightSeverity.ERROR, (myOp == Operation.Delete) ? message("ANN.deleting.none") : message("ANN.assign.to.none")).range(node).create(); } }