/// <summary>
/// Returns a string with all of the variable and expression substitutions done.
/// </summary>
/// <param name="source">The string to expand.
/// </param>
/// <returns>The expanded string.</returns>
/// <exception cref="ParseException">
/// Thrown if a parse exception occurred during subexpression substitution.
/// </exception>
public string ExpandString(string source)
{
if (_cmdlet != null)
{
_cmdlet.ThrowIfStopping();
}
return(_context.Engine.Expand(source));
}