Change unlockedSources call to use filter instead of map - fixes #171
Change unlockedSources call to use filter instead of map - fixes #171

buttercup/buttercup-core,buttercup/buttercup-core,perry-mitchell/buttercup-core,perry-mitchell/buttercup-core,buttercup/buttercup-core,buttercup-pw/buttercup-core,buttercup-pw/buttercup-core