PsiType (final PsiTypeParameter typeParameter, PsiSubstitutor substitutor, PsiElement parent, ReductionSystem system) { PsiTypeParameterListOwner owner = typeParameter.getOwner(); PsiType substitution = PsiTypes.nullType(); if (owner instanceof PsiMethod && parent instanceof PsiMethodCallExpression methodCall) { substitution = inferMethodTypeParameterFromParent(methodCall.getParent(), methodCall, typeParameter, substitutor, system); } return substitution; }