canExecuteEditingCommand
open fun canExecuteEditingCommand(command: String, cancellable: <Error class: unknown class>? = null, callback: <Error class: unknown class>?)
Asynchronously check if it is possible to execute the given editing command.
When the operation is finished, @callback will be called. You can then call webkit_web_view_can_execute_editing_command_finish() to get the result of the operation.
Parameters
command
the command to check
cancellable
a #GCancellable or null to ignore
callback
a #GAsyncReadyCallback to call when the request is satisfied