NativeLsl_push_chunk_itp typedef
        NativeLsl_push_chunk_itp =
     Int32 Function(lsl_outlet out, Pointer<Int32>  data, UnsignedLong data_elements, Double timestamp, Int32 pushthrough)
    
    
    
Implementation
typedef NativeLsl_push_chunk_itp =
    ffi.Int32 Function(
      lsl_outlet out,
      ffi.Pointer<ffi.Int32> data,
      ffi.UnsignedLong data_elements,
      ffi.Double timestamp,
      ffi.Int32 pushthrough,
    );