FNiagaraParameterDefinitionsToolkitParameterPanelViewModel ( [UNiagaraParameterDefinitions](API\Plugins\NiagaraEditor\UNiagaraParameterDefinitions) * InParameterDefinitions, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FNiagaraObjectSelection](API\Plugins\NiagaraEditor\FNiagaraObjectSelection) > & InObjectSelection )