ReferenceSearch doesn't exist in Android Studio?

Hi, I'm completely new in this, I'm trying to create a custom lint, to check if an object is properly released:

execution = TaskOrchestrator.enqueueTask(
        Task(TaskOrchestrator.Priority.HIGH) {
            Log.d("TEST", "Test")
        }
)

execution?.release()

I want to check if execution?.release() is called. In order to do that, I checked the calls to the method enqueueTask with getApplicableMethodNames() and then I got the left operand of the UBinaryExpression:

USimpleNameReferenceExpression referenceExpression = (USimpleNameReferenceExpression) resolve.getLeftOperand();
PsiElement element = UastUtils.tryResolve(referenceExpression);

The only thing I need to do now is check all the references to this PsiElement in the current scope and check if one of them is a release call. I thought ReferenceSearch would be exactly what I need, I was planning to do something like this:

references = ReferencesSearch.search(element, new LocalSearchScope(element)).findAll();

Then iterate over all the references and if none of them is release call, report it.

The problem is that I can't find ReferenceSearch anywhere, I tried to manually 

import com.intellij.psi.search.searches.ReferenceSearch

But it seems like this class doesn't exist, only these 3 classes exist under the searches package:

import com.intellij.psi.search.searches.ExtensibleQueryFactory
import com.intellij.psi.search.searches.DeepestSuperMethodsSearch
import com.intellij.psi.search.searches.SuperMethodsSearch

Do you know how can I find the references to PsiElement in android studio? any help would be really helpful since I spent a lot of hours trying to figure out what's going on.

Thank you!