3 [dist4]message_header // num_bytes
9 [dist4]method5_params // num_bytes
11 [dist8]param0_ptr // param0
17 [dist4]struct_e // num_bytes
19 [dist8]struct_d_ptr // struct_d
20 [u4]4 // data_pipe_consumer: The same value as |param1| above.
25 [dist4]struct_d // num_bytes
27 [dist8]message_pipes_ptr // message_pipes
30 [anchr]message_pipes_ptr
31 [dist4]message_pipe_array // num_bytes
35 [anchr]message_pipe_array