question: final public void writeChunk ( L locator , KVO < O > [ ] chunk ) throws MockStaleLocatorException { synchronized ( this ) { if ( staleLocators . contains ( locator . getPartitionId ( ) ) ) { throw new MockStaleLocatorException ( locator ) ; } if ( ! knownLocators . contains ( locator . getPartitionId ( ) ) ) { throw new RuntimeException ( "Locator not registered on DS: " + locator ) ; } } acceptWrite ( locator , chunk ) ; }
target:  Write a chunk onto the data service.