void ( @NotNull PsiMethodCallExpression expression) { super.visitMethodCallExpression(expression); final PsiReferenceExpression methodExpression = expression.getMethodExpression(); final String methodName = methodExpression.getReferenceName(); @NonNls final String signal = "signal"; if (!signal.equals(methodName)) { return; } final PsiExpressionList argumentList = expression.getArgumentList(); if (!argumentList.isEmpty()) { return; } final PsiMethod method = expression.resolveMethod(); if (method == null) { return; } final PsiClass containingClass = method.getContainingClass(); if (containingClass == null) { return; } if (!InheritanceUtil.isInheritor(containingClass, "java.util.concurrent.locks.Condition")) { return; } registerMethodCallError(expression); }