readInt64 method
Implementation
int readInt64() {
offset += 8;
if (useFixnum) {
offset -= 8;
var i1 = readInt32();
var i2 = readInt32();
var i64 = Int64.fromInts(i2, i1);
return i64.toInt();
}
return byteArray.getInt64(offset - 8, Endian.little);
}