| /proc/get_nested_locs | Returns a list of all locations (except the area) the movable is within. | 
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        | /proc/get_closest_atom | Returns the closest atom of a given type to the source atom. | 
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        | /proc/get_closest_atom_to_group | Returns the closest atom of a given type to the center of a list of atoms. Can be very expensive with large lists. | 
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        | /proc/stoplag | returns the number of ticks slept | 
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        | /proc/REF | \ref behaviour got changed in 512 so this is necesary to replicate old behaviour.
If it ever becomes necesary to get a more performant REF(), this lies here in wait
#define REF(thing) (thing && isdatum(thing) && (thing:datum_flags & DF_USE_TAG) && thing:tag ? "[thing:tag]" : text_ref(thing)) | 
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