anchor.diff:  %% =======================================================
   
   g_mapjson() ->
  -	%?TRIQLET(X, list(oneof([
   	?LET(X, list(oneof([
   		{name, g_name()},
   		{background_color,  g_color()},
  
positive.code: 	])), uniquify(X)).
  
  g_name() ->
  	%?TRIQLET(N,
  	?LET(N,
  	list(
  		frequency([
  
negative.code: 
  g_opacity() ->
  	?LET(N, int(), case N of 0 -> 0; _ -> 1 / abs(N) end).
  
  g_color_rgb() ->
  	[R,B,G,_] = g_color_rgba(),
  