boolean (@NotNull PsiVariable variable) { final PsiExpression initializer = variable.getInitializer(); if (initializer != null && expressionIsSometimesNull(initializer)) { return true; } final Query<PsiReference> references = ReferencesSearch.search(variable); for (final PsiReference reference : references) { final PsiElement element = reference.getElement(); if (!(element instanceof PsiReferenceExpression)) { continue; } final PsiElement parent = element.getParent(); if (!(parent instanceof PsiAssignmentExpression assignment)) { continue; } if (assignment.getLExpression().equals(element) && expressionIsSometimesNull(assignment.getRExpression())) { return true; } } return false; }