[ENSCORESW-2289]. Match signature of ChainedAssemblyMapper.
[ENSCORESW-2289]. Match signature of ChainedAssemblyMapper.

muffato/ensembl,muffato/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,muffato/ensembl,muffato/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl