/// <summary>
/// Clear a Velocity Runtime property.
/// </summary>
/// <param name="key">key of property to clear</param>
public void ClearProperty(String key)
{
runtimeInstance.ClearProperty(key);
}
/// <summary> Clear a Velocity Runtime property.
///
/// </summary>
/// <param name="key">of property to clear
/// </param>
public virtual void ClearProperty(string key)
{
ri.ClearProperty(key);
}