@Override
  public @NotNull PsiExpression getExpression() {
    PsiExpression expression = (PsiExpression)SourceTreeToPsiMap.treeElementToPsi(findChildByType(ElementType.EXPRESSION_BIT_SET));
    if (expression != null) return expression;
    LOG.error("Illegal PSI: \n" + DebugUtil.psiToString(getParent(), true));
    return null;
  }
@Override
  public @NotNull PsiExpression getExpression()