/// <summary>
/// Changes builder instance.
/// </summary>
/// <param name="newBuilder">New builder to set.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="newBuilder" /> is <c>null</c>.
/// </exception>
public void ChangeShellBuilder(IShellAsyncBuilder newBuilder)
{
_shellBuilder = newBuilder.ThrowIfNull(nameof(newBuilder));
}
/// <summary>
/// Initializes director with passed builder.
/// </summary>
/// <param name="shellBuilder">Instance of builder.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="shellBuilder" /> is <c>null</c>.
/// </exception>
public ShellAsyncBuilderDirector(IShellAsyncBuilder shellBuilder)
{
_shellBuilder = shellBuilder.ThrowIfNull(nameof(shellBuilder));
}