Utility methods for tree-processing using PsiElementPattern?

Hi,

I'd like to use PsiElementPatterns to find elements in a tree. Something like

val dotMatcher: PsiElementPattern.Capture<RExpression> = psiElement(RExpression::class.java)
        .withText(".")
        .withParent(psiElement(RArgumentList::class.java))

PsiTreeUtil.findMatchingElements(myFixture.file, dotMatcher)

Unfortunately there is no findMatchingElements, and PsiTreeUtil does not contain any methods that accept PsiElementPattern.Capture as an argument. Is there a different utility class for ElementPatterns? If not what would a concise/recommended visitor implementation for such a usecase?

Thanks,
Holger