code: def wait_for_bar(t):
      """
        Wait to make the test system correctly recognize the 'bar' file as
      touched after the next build run. Without the wait, the next build run may
      rebuild the 'bar' file with the new and the old file modification timestamp
      too close to each other - which could, depending on the currently supported
      file modification timestamp resolution, be detected as 'no change' by the
      testing system.
  
      """
      t.wait_for_time_change("bar", touch=False)
  
label_desc: Use image node_id 1 for calling a global function with example usage: wait_for_bar(t) without return types