NativeLsl_push_chunk_ltn typedef
        NativeLsl_push_chunk_ltn =
     Int32 Function(lsl_outlet out, Pointer<Int64>  data, UnsignedLong data_elements, Pointer<Double>  timestamps)
    
    
    
Implementation
typedef NativeLsl_push_chunk_ltn =
    ffi.Int32 Function(
      lsl_outlet out,
      ffi.Pointer<ffi.Int64> data,
      ffi.UnsignedLong data_elements,
      ffi.Pointer<ffi.Double> timestamps,
    );