Same as \helpref{wxArtProvider::GetBitmap}{wxartprovidergetbitmap}, but
return a wxIcon object (or wxNullIcon on failure).
+\func{static wxSize}{GetSize}{\param{const wxArtClient\& }{client}, \param{bool }{platform_default = false}}
+
+Returns the default size for the given art {\it client} by either using the topmost
+wxArtProvider or if {\it platform_default} is \true then return a suitable default size for
+{\it client} depending on the current platform.
+
\membersection{wxArtProvider::PopProvider}\label{wxartproviderctor}
\func{static bool}{PopProvider}{\void}