@NotNull
public static PsiReference[] getReferences(BnfListEntry o) {
BnfAttr attr = PsiTreeUtil.getParentOfType(o, BnfAttr.class);
if (attr == null || !Comparing.equal(KnownAttribute.METHODS.getName(), attr.getName())) return PsiReference.EMPTY_ARRAY;
PsiElement id = o.getId();
BnfLiteralExpression value = o.getLiteralExpression();
if (id == null || value != null) return PsiReference.EMPTY_ARRAY;
final String psiImplUtilClass = getRootAttribute(attr, KnownAttribute.PSI_IMPL_UTIL_CLASS);
final JavaHelper javaHelper = JavaHelper.getJavaHelper(o.getProject());
return new PsiReference[] {