@NotNull
 public String getType(@NotNull PsiElement psiElement) {
   IElementType iElementType = MakefileIdentifierReference.type(psiElement);
   if (iElementType == MakefileTokenTypes.VAR_DEFINITION) return "definition";
   if (iElementType == MakefileTokenTypes.TARGET_IDENTIFIER) return "target";
   return "should not happen type";
 }
 public boolean canFindUsagesFor(@NotNull PsiElement psiElement) {
   return MakefileIdentifierReference.isSelfReferenceType(
       MakefileIdentifierReference.type(psiElement));
 }