visitor.visit(lst::environment_field<int64_t>("tracer_major", _app_tracer_version.major));
visitor.visit(lst::environment_field<int64_t>("tracer_minor", _app_tracer_version.minor));
visitor.visit(lst::environment_field<const char *>("tracer_buffering_scheme",
visitor.visit(lst::environment_field<int64_t>("tracer_major", _app_tracer_version.major));
visitor.visit(lst::environment_field<int64_t>("tracer_minor", _app_tracer_version.minor));
visitor.visit(lst::environment_field<const char *>("tracer_buffering_scheme",