void SubscribeBindingNameToExternalParameterDefinitions ( [UNiagaraParameterDefinitions](API\Plugins\NiagaraEditor\UNiagaraParameterDefinitions) * NewParameterDefinitions, const [FGuid](API\Runtime\Core\Misc\FGuid) & ExternalScriptVarId, const [FGuid](API\Runtime\Core\Misc\FGuid) & InternalScriptVarId )