void ( @NotNull PsiSynchronizedStatement statement) { super.visitSynchronizedStatement(statement); final PsiExpression lockExpression = PsiUtil.skipParenthesizedExprDown(statement.getLockExpression()); if (!(lockExpression instanceof PsiReferenceExpression)) { return; } final PsiElement element = ((PsiReferenceExpression)lockExpression).resolve(); if (!(element instanceof PsiField field)) { return; } if (field.hasModifierProperty(PsiModifier.FINAL)) { return; } registerError(lockExpression, field); }