h1 = line (rand (3, 1), rand (3, 1))

h1 = 0.00097656

h2 = line (rand (3, 1), rand (3, 1))

h2 = 172

h3 = line (rand (3, 1), rand (3, 1))

h3 = 173

set (0, 'showhiddenhandles', 'on')
get (gca (), 'children')             % expect [h3; h2; h1; hidden...]

ans =
          177
          176
          175
          174
          173
          172
   0.00097656

set (0, 'showhiddenhandles', 'off')
set (h2, 'handlevisibility', 'off');
kids = get (gca (), 'children')      % should only get [h3; h1]

kids =
          173
   0.00097656

set (0, 'showhiddenhandles', 'on')
get (gca (), 'children')             % expect [h3; h2; h1; other hidden...]

ans =
          177
          176
          175
          174
          173
          172
   0.00097656

set (0, 'showhiddenhandles', 'off')
set (gca (), 'children', flipud (kids))
get (gca (), 'children')             % expect [h1; h3]

ans =
   0.00097656
          173

set (0, 'showhiddenhandles', 'on')
get (gca (), 'children')

ans =
          177
          176
          175
          174
          172
   0.00097656
          173