[dist4]message_header // num_bytes
[u4]0 // version
[u4]0 // interface ID
[u4]23 // name
[u4]0 // flags
[u4]0 // padding
[anchr]message_header
[dist4]method23_params
[u4]0 // version
[dist8]param0_ptr // param0: array<bool?>
[dist8]param1_ptr // param1: array<uint32?>
[anchr]method23_params
[anchr]param0_ptr
[dist4]param0_member // num_bytes
[u4]0 // num_elements
[anchr]param0_member
[anchr]param1_ptr
[dist4]param1_member // num_bytes
[u4]2 // num_elements
[u4]0 // bitfield
[u4]0 // element 0
// truncated and missing element here
[anchr]param1_member