:sig
String var_dump(StringMap t, String prefix = "", String postfix = "\n")
String var_dump(StringList t, String prefix = "", String postfix = "\n")
String var_dump(DTree t, String prefix = "", String postfix = "\n")

:params
t : object to be dumped into a string
return value : string containing a human-friendly representation of 't'

:desc
Returns a string representation of 't' intended for debugging.