/// <summary>
/// Gets <paramref name="typeParameterSymbol"/> and its all constraint types.
/// </summary>
/// <param name="typeParameterSymbol">The typeParameterSymbol to act on.</param>
/// <param name="includeInterfaces">(Optional) True to include, false to exclude the interfaces.</param>
/// <returns/>
public static IEnumerable <ITypeSymbol> GetTypeWithAllConstraintTypes(this ITypeParameterSymbol typeParameterSymbol,
bool includeInterfaces = true)
{
var constraintTypes = typeParameterSymbol.GetAllConstraintTypes(includeInterfaces);
return(typeParameterSymbol.ToEnumerable()
.Concat(constraintTypes));
}