question: murmur3 64-bit variant . this is essentially msb 8 bytes of murmur3 128-bit variant . concode_field_sep int DEFAULT_SEED concode_elem_sep int M concode_elem_sep int C2_32 concode_elem_sep int R1 concode_elem_sep int R3 concode_elem_sep int C1_32 concode_elem_sep int N2 concode_elem_sep long NULL_HASHCODE concode_elem_sep int N_32 concode_elem_sep long C1 concode_elem_sep long C2 concode_elem_sep int R1_32 concode_elem_sep int N1 concode_elem_sep int R2 concode_elem_sep int R2_32 concode_elem_sep int M_32 concode_field_sep int hash32 concode_elem_sep int hash32 concode_elem_sep long[] hash128 concode_elem_sep long[] hash128 concode_elem_sep long fmix64
target: long function ( byte [ ] arg0 ) { return hash64 ( arg0 , 0 , arg0 . length , DEFAULT_SEED ) ; }