/// <summary> /// Create a <see cref="SymbolAndDeclaration{IEventSymbol, EventDeclarationSyntax}"/> is symbol exists. /// </summary> /// <param name="symbol">The <see cref="IEventSymbol"/>.</param> /// <param name="cancellationToken">The <see cref="CancellationToken"/> that cancels the operation.</param> /// <param name="result">The <see cref="SymbolAndDeclaration{IEventSymbol, EventDeclarationSyntax}"/>.</param> /// <returns>True if the symbol exists.</returns> public static bool TryCreate(IEventSymbol symbol, CancellationToken cancellationToken, out SymbolAndDeclaration <IEventSymbol, EventDeclarationSyntax> result) { if (symbol is null) { throw new System.ArgumentNullException(nameof(symbol)); } if (symbol.TrySingleEventDeclaration(cancellationToken, out var declaration)) { result = new SymbolAndDeclaration <IEventSymbol, EventDeclarationSyntax>(symbol, declaration); return(true); } result = default; return(false); }