is_descended_from: Stop looking if ancestor is not in all our chains.
is_descended_from: Stop looking if ancestor is not in all our chains.

jonnynewbs/bitcoin-abe,CraigsCoin/abe-craigscoin,jeorgen/bitcoin-abe,n00bsys0p/altcoin-abe,muchbeli/bitcoin-abe,Rimbit/RimbitExplorer,Max-Coin/maxcoin-abe,ultracoindev/ultracoin-abe,gjhiggins/altcoin-abe,gjhiggins/abe-bee2,ultracoindev/ultracoin-abe,MatthewLM/PeercoinAbeExplorer,leadcoin-reboot/leadcoin-abe,gjhiggins/chaincoin-abe,BuckyGreen/latiumexplorer,jeromewu/bitcoin-abe-opennet,jonnynewbs/bitcoin-abe,Cybnate/NuBits-Abe-explorer,Serya05/bitcoin-abe,BuckyGreen/latiumexplorer,not2bforgotten/bitcoin-abe,gjhiggins/abe-bee2,MatthewLM/PeercoinAbeExplorer,machado-rev/HTMLCoinExplorer,Cybnate/NuBits-Abe-explorer,cryptapus/bitcoin-abe,MatthewLM/PeercoinAbeExplorer,machado-rev/HTMLCoinExplorer,ultracoindev/ultracoin-abe,Cybnate/NuBits-Abe-explorer,gjhiggins/altcoin-abe,Cybnate/NuBits-Abe-explorer,Max-Coin/maxcoin-abe,Serya05/bitcoin-abe,mmitech/bitcoin-abe,machinecoin-project/machinecoin-blockchainexplorer-abe,mmitech/bitcoin-abe,ultracoindev/ultracoin-abe,ultracoindev/ultracoin-abe,Rimbit/RimbitExplorer,machado-rev/HTMLCoinExplorer,gjhiggins/chaincoin-abe,cryptapus/bitcoin-abe,machinecoin-project/machinecoin-blockchainexplorer-abe,jeorgen/bitcoin-abe,UdjinM6/darkcoin-abe,MatthewLM/PeercoinAbeExplorer,sacarlson/bitcoin-abe,gjhiggins/abe-bee2,CraigsCoin/abe-craigscoin,muchbeli/bitcoin-abe,Rimbit/RimbitExplorer,jeromewu/bitcoin-abe-opennet,UdjinM6/darkcoin-abe,muchbeli/bitcoin-abe,n00bsys0p/altcoin-abe,BuckyGreen/latiumexplorer,muchbeli/bitcoin-abe,leadcoin-reboot/leadcoin-abe,machado-rev/HTMLCoinExplorer,BuckyGreen/latiumexplorer,Dilmacoin/dilmacoin-abe,Rimbit/RimbitExplorer,Dilmacoin/dilmacoin-abe,Cybnate/NuBits-Abe-explorer