testData/generator/SelfBnf.expected.java [555:566]:
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  public static boolean paren_opt_expression(PsiBuilder builder, int level) {
    if (!recursion_guard_(builder, level, "paren_opt_expression")) return false;
    if (!nextTokenIs(builder, BNF_LEFT_BRACKET)) return false;
    boolean result, pinned;
    Marker marker = enter_section_(builder, level, _NONE_, BNF_PAREN_OPT_EXPRESSION, null);
    result = consumeToken(builder, BNF_LEFT_BRACKET);
    result = result && expression(builder, level + 1);
    pinned = result; // pin = 2
    result = result && consumeToken(builder, BNF_RIGHT_BRACKET);
    exit_section_(builder, level, marker, result, pinned, null);
    return result || pinned;
  }
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gen/org/intellij/grammar/parser/GrammarParser.java [556:567]:
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  public static boolean paren_opt_expression(PsiBuilder builder, int level) {
    if (!recursion_guard_(builder, level, "paren_opt_expression")) return false;
    if (!nextTokenIs(builder, BNF_LEFT_BRACKET)) return false;
    boolean result, pinned;
    Marker marker = enter_section_(builder, level, _NONE_, BNF_PAREN_OPT_EXPRESSION, null);
    result = consumeToken(builder, BNF_LEFT_BRACKET);
    result = result && expression(builder, level + 1);
    pinned = result; // pin = 2
    result = result && consumeToken(builder, BNF_RIGHT_BRACKET);
    exit_section_(builder, level, marker, result, pinned, null);
    return result || pinned;
  }
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