Summary
    Registers the `callback` with the `name` but throws an 
		System.ArgumentException
    if something was already registered with the same `name`.
    
    It will be invoked using System.Object.ToString on the
    Animancer.AnimancerEvent.CurrentParameter.
    - Assembly
- Animancer.dll 
- Namespace
- Animancer
- Containing Type
- NamedEventDictionary
Syntax
public Action AddNew(StringReference name, Action<string> callback)Remarks
    This matches the standard 
	System.Collections.Generic.Dictionary`2.Add(`0,`1)
    behaviour, unlike Animancer.NamedEventDictionary.AddTo(Animancer.StringReference,System.Action{System.String}).
    
    If you want to later remove the `callback`,
    you need to store and remove the returned System.Action.
    Parameters
| Name | Type | Description | 
|---|---|---|
| name | StringReference | |
| callback | Action | 
Return Value
| Type | Description | 
|---|---|
| Action |