Antlr3.Tool.Grammar.LegalOption C# (CSharp) Method

        public virtual bool LegalOption( string key )
        {
            switch ( type )
            {
            case GrammarType.Lexer:
                return !legalLexerOptions.Contains( key );
            case GrammarType.Parser:
                return !legalParserOptions.Contains( key );
            case GrammarType.TreeParser:
                return !legalTreeParserOptions.Contains( key );
            default:
                return !legalParserOptions.Contains( key );
            }
        }