MNT: short-circuit if unique key in input
MNT: short-circuit if unique key in input

tacaswell/metadataStore,arkilic/metadatastore,tacaswell/metadataStore,NSLS-II/metadatastore,ericdill/databroker,hhslepicka/metadatastore,ericdill/databroker,hhslepicka/metadatastore,NSLS-II/metadatastore,arkilic/metadatastore