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