params [
	["_cfg", configNull, [configNull]],
	["_code", {}, [{}]]
];

if (isNull _cfg) exitWith {["Provided config is null!"] call BIS_fnc_error};

[_cfg] call _code;

// get children and recurse
private _childCfgs = _cfg call BIS_fnc_returnChildren;
{
	[_x, _code] call milsim_fnc_recurseSubclasses;
} forEach _childCfgs;