writeInt64 method
Writes an Int64.
Implementation
int writeInt64(int n, [Endian endian = Endian.big]) {
final pos = bytesIO.position;
bytesIO.ensureCapacity(pos + 8);
_platform.setDataTypeHandlerInt64(_bytesData, n, pos);
bytesIO.incrementPosition(8);
return 8;
}