public static PhpArrayElementSyntaxNode Parse(PhpTokeniser tokeniser)
        {
            tokeniser.SkipWhitespace();

            PhpStringLiteralSyntaxNode key = tokeniser.GetTrivia() switch
            {
                '\'' => PhpStringLiteralSyntaxNode.Parse(tokeniser),
                '"' => PhpStringLiteralSyntaxNode.Parse(tokeniser),
                _ => throw tokeniser.ConstructError($"Invalid array value identifier ({tokeniser.GetTrivia()}).")
            };

            tokeniser.SkipWhitespace();
            tokeniser.SkipPattern(new[] { '=', '>' });
            tokeniser.SkipWhitespace();

            PhpSyntaxNode value = tokeniser.GetTrivia() switch
            {
                '\'' => PhpStringLiteralSyntaxNode.Parse(tokeniser),
                '"' => PhpStringLiteralSyntaxNode.Parse(tokeniser),
                '[' => PhpArraySyntaxNode.Parse(tokeniser),
                _ => throw tokeniser.ConstructError($"Invalid array value identifier ({tokeniser.GetTrivia()}).")
            };

            tokeniser.SkipWhitespace();

            // Skip trailing trivia for this element.
            if (tokeniser.TryGetTrivia(out var trivia) && trivia == ',')
            {
                tokeniser.Advance();
            }
            tokeniser.SkipWhitespace();

            return(new PhpArrayElementSyntaxNode(key, value));
        }
    }
}
 public PhpArrayElementSyntaxNode(PhpStringLiteralSyntaxNode key, PhpSyntaxNode value)
 {
     Key   = key;
     Value = value;
 }