XBT_PRIVATE bool TRACE_msg_vm_is_enabled();
XBT_PRIVATE bool TRACE_buffer();
XBT_PRIVATE bool TRACE_disable_link();
XBT_PRIVATE bool TRACE_disable_speed();
XBT_PRIVATE bool TRACE_msg_vm_is_enabled();
XBT_PRIVATE bool TRACE_buffer();
XBT_PRIVATE bool TRACE_disable_link();
XBT_PRIVATE bool TRACE_disable_speed();