+(TargetMouseBtn*) unstringifyImpl: (NSArray*) comps {
NSParameterAssert([comps count] == 2);
TargetMouseBtn* target = [[TargetMouseBtn alloc] init];
- [target setWhich: [[comps objectAtIndex:1] integerValue]];
+ [target setWhich: [comps[1] integerValue]];
return target;
}