/// <summary>
/// Gets the symbol associated with a declaration syntax node.
/// </summary>
/// <param name="semanticModel"></param>
/// <param name="declaration">A syntax node that is a declaration. This can be any type
/// derived from MemberDeclarationSyntax, TypeDeclarationSyntax, EnumDeclarationSyntax,
/// NamespaceDeclarationSyntax, ParameterSyntax, TypeParameterSyntax, or the alias part of a
/// UsingDirectiveSyntax</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The symbol declared by the node or null if the node is not a declaration.</returns>
public static ISymbol?GetDeclaredSymbol(
this SemanticModel semanticModel,
SyntaxNode declaration,
CancellationToken cancellationToken = default(CancellationToken)
)
{
return(semanticModel.GetDeclaredSymbolForNode(declaration, cancellationToken));
}