sig
  type t =
      Domain_young_limit
    | Domain_young_ptr
    | Domain_exception_pointer
    | Domain_young_base
    | Domain_young_start
    | Domain_young_end
    | Domain_young_alloc_start
    | Domain_young_alloc_end
    | Domain_young_alloc_mid
    | Domain_young_trigger
    | Domain_minor_heap_wsz
    | Domain_in_minor_collection
    | Domain_extra_heap_resources_minor
    | Domain_ref_table
    | Domain_ephe_ref_table
    | Domain_custom_table
    | Domain_mark_stack
    | Domain_stack_low
    | Domain_stack_high
    | Domain_stack_threshold
    | Domain_extern_sp
    | Domain_trapsp
    | Domain_trap_barrier
    | Domain_external_raise
    | Domain_exn_bucket
    | Domain_top_of_stack
    | Domain_bottom_of_stack
    | Domain_last_return_address
    | Domain_gc_regs
    | Domain_backtrace_active
    | Domain_backtrace_pos
    | Domain_backtrace_buffer
    | Domain_backtrace_last_exn
    | Domain_compare_unordered
    | Domain_requested_major_slice
    | Domain_requested_minor_gc
    | Domain_local_roots
    | Domain_stat_minor_words
    | Domain_stat_promoted_words
    | Domain_stat_major_words
    | Domain_stat_minor_collections
    | Domain_stat_major_collections
    | Domain_stat_heap_wsz
    | Domain_stat_top_heap_wsz
    | Domain_stat_compactions
    | Domain_stat_forced_major_collections
    | Domain_stat_heap_chunks
    | Domain_eventlog_startup_timestamp
    | Domain_eventlog_startup_pid
    | Domain_eventlog_paused
    | Domain_eventlog_enabled
    | Domain_eventlog_out
  val idx_of_field : Domainstate.t -> int
end