Player list
The player list header and footer is the text shown above and underneath the player list, on the player's screen when holding the key TAB
on their keyboard.
Setting the header and footer
api.setHeader(player, "My header");
api.setFooter(player, "My footer");
api.setHeaderWithPlaceholders(player, "My header");
api.setFooterWithPlaceholders(player, "My footer");
Getting the header and footer values
api.getHeader(player);
api.getFooter(player);