A fish lure is provided with one or more fishing hook and an attachment for a fishing line, the fishing hook being arranged in a body and being connected to an actuator, a hook-shaped end portion of the fishing hook being arranged to be moved between a first position, substantially enveloped in the body, and a second position, projecting from the body. The technique comprises: assigning the object to an assigned frame wherein the object can be released when the assigned frame is released; detecting an attempt to place a reference to the object in an older frame, the older frame being older than the assigned frame; and reassigning the object to a reassignment frame that is at least as old as the older frame. Methods for producing a maize plant that comprises crossing maize variety X7K470 with another maize plant. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier.