public Observable<Page<NamespaceResourceInner>> listAsync() {
        return listWithServiceResponseAsync()
            .map(new Func1<ServiceResponse<Page<NamespaceResourceInner>>, Page<NamespaceResourceInner>>() {
                @Override
                public Page<NamespaceResourceInner> call(ServiceResponse<Page<NamespaceResourceInner>> response) {
                    return response.body();
                }
            });
    }
public Observable < Page < NamespaceResourceInner > > listAsync ( ) { return listWithServiceResponseAsync ( ) . map ( new Func1 < ServiceResponse < Page < NamespaceResourceInner > > , Page < NamespaceResourceInner > > ( ) { @ Override public Page < NamespaceResourceInner > call ( ServiceResponse < Page < NamespaceResourceInner > > response ) { return response . body ( ) ; } } ) ; }
Lists all the available namespaces within the subscription irrespective of the resourceGroups.

@throws IllegalArgumentException thrown if parameters fail the validation
@return the observable to the PagedList&lt;NamespaceResourceInner&gt; object