bugfix: CAFEGeneFamilyNodeAdaptor doesn't implement fetch_parent_for node, so the only way of getting a parent is if the link is already there
bugfix: CAFEGeneFamilyNodeAdaptor doesn't implement fetch_parent_for node, so the only way of getting a parent is if the link is already there

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara