execute_background

Description:

public async R execute_background<R> (owned Callback<T,R> func, int priority = DEFAULT, Cancellable? cancellable = null) throws Error

Execute a callback in a background thread which uses a resource

func	the callback to execute
priority	the priority with which to create the resource
cancellable	optional cancellable for aborting the opearation

the return value from the callback