value v = alloc_custom(&ops, sizeof(ml_Editor*), 0, 1);
ml_Editor** ml_editor_ref = (ml_Editor**) Data_custom_val(v);
ml_Editor* ml_editor = *ml_editor_ref = malloc(sizeof(ml_Editor));
value v = alloc_custom(&ops, sizeof(ml_Editor*), 0, 1);
ml_Editor** ml_editor_ref = (ml_Editor**) Data_custom_val(v);
ml_Editor* ml_editor = *ml_editor_ref = malloc(sizeof(ml_Editor));