static List<PsiExpression> collectParameterAccesses(PsiParameter parameter,
                                                          PsiReferenceExpression mapReference,
                                                          PsiElement body) {
        final ParameterAccessCollector collector = new ParameterAccessCollector(parameter, mapReference);
        body.accept(collector);
        return collector.getParameterAccesses();
      }
static List<PsiExpression> collectParameterAccesses(PsiParameter parameter,
                                                          PsiReferenceExpression mapReference,
                                                          PsiElement body)