@Override
  public void visitMethodReferenceExpression(@NotNull PsiMethodReferenceExpression expression) {
    startElement(expression);

    PsiExpression qualifier = expression.getQualifierExpression();
    if (qualifier != null) {
      qualifier.accept(this);
    }
    else {
      pushUnknown();
    }

    addInstruction(new MethodReferenceInstruction(expression));

    finishElement(expression);
  }
@Override
  public void visitMethodReferenceExpression(@NotNull PsiMethodReferenceExpression expression)