Package-private access in metric's tests breaks IntelliJ Platform standard methods #105

In module stockmetrics class NumMethodsThatCallMetricTest has ignored test ignoreTestPackagePrivate.
ReferencesSearch.search(PsiElement) returns all references for given element in code. For some reason it returns empty list for method with package-private access. The problem occurs only in tests of metrics. Running the plugin on its own doesn't reproduce this issue.