IconInfo.loadSymbolicAsync

void loadSymbolicAsync(gdk.rgba.RGBA fg,  gdk.rgba.RGBA successColor,  gdk.rgba.RGBA warningColor,  gdk.rgba.RGBA errorColor,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Asynchronously load, render and scale a symbolic icon previously looked up from the icon theme using [gtk.icon_theme.IconTheme.lookupIcon].

For more details, see [gtk.icon_info.IconInfo.loadSymbolic] which is the synchronous version of this call.

Parameters

`fg`	a #GdkRGBA representing the foreground color of the icon
`successColor`	a #GdkRGBA representing the warning color of the icon or null to use the default color
`warningColor`	a #GdkRGBA representing the warning color of the icon or null to use the default color
`errorColor`	a #GdkRGBA representing the error color of the icon or null to use the default color (allow-none)
`cancellable`	optional #GCancellable object, null to ignore
`callback`	a #GAsyncReadyCallback to call when the request is satisfied