Method code for $root.add_flag()

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arg flag;

(> .perms(sender(), 'manager) <);
(> $sys.touch('coreok) <);
if (flag == 'core && !$sys.is_system(sender()))
    throw(~perm, "Only system objects can set the 'core flag.");
flag == 'fertile && (> .perms(sender(), 'manager) <);

// let them add any flag they want
flags = (flags || []).setadd(flag);

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["// Created as a part of ColdCore, see: @help Credit"]