npc/custom/warper.txt#L39
// ------------------- Functions -------------------
// * Go("<map>",<x>,<y>);
// ~ Warps directly to a map.
//
// * Disp("<Menu Option>",<first option>,<last option>);
// * Pick("<map_prefix>"{,<index offset>});
// ~ Dynamic menu and map selection (auto-numbered).
//
// * Disp("<Option 1>:<Option 2>:<etc.>");
// * Pick("","<map1>","<map2>","<etc.>");
// ~ Manual menu and map selection (listed).
//
// * Restrict("<RE | Pre-RE>"{,<menu option numbers>});
// ~ Only allows map for Renewal or Pre-Renewal modes.
// If menu option numbers are given, only those maps
// will be restricted (i.e. not for "Go").
//