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# argument_number(++Functor, ++AttributeName, -AttributeNumber, -Default)

Helper to access attributes of visualization and visualizer terms

Functor
  returns the current node id number
AttributeName
  atom, attribute name
AttributeNumber
  variable, will be instantiated to the argument number of the attribute name searched for
Default
  default value used for attribute; value system(_) states that value is set by system not user,

## Description

Internal use only

## See Also