question: public void importKey ( ECKey key ) { lock . lock ( ) ; try { checkKeyEncryptionStateMatches ( key ) ; if ( hasKey ( key ) ) return ; importKeyLocked ( key ) ; queueOnKeysAdded ( ImmutableList . of ( key ) ) ; } finally { lock . unlock ( ) ; } }
target:  Imports a key to the key chain. If key is present in the key chain, ignore it.