question: upgrade a reader lock entry for transaction tx on object obj and write it to the persistent storage . concode_field_sep LockMap lockMap concode_elem_sep long DEFAULT_LOCK_TIMEOUT concode_field_sep boolean hasReadLock concode_elem_sep boolean setWriter concode_elem_sep void removeWriter concode_elem_sep LockEntry getWriter concode_elem_sep void removeReader concode_elem_sep Collection getReaders concode_elem_sep boolean addReader
target: boolean function ( LockEntry arg0 ) { return lockMap . upgradeLock ( arg0 ) ; }