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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_mappings(self, defn: Definition, target: Dict) -> None: """ Process any mappings in defn, adding all of the mappings prefixes to the namespace map and add a link to the first mapping to the target @param defn: Class or Slot definition @param target: context target """

        self.add_id_prefixes(defn)
        for mapping in defn.mappings:
            if '://' in mapping:
                target['@id'] = mapping
            else:
                if ':' not in mapping or len(mapping.split(':')) != 2:
                    raise ValueError(f"Definition {defn.name} = unrecognized mapping: {mapping}")
                ns = mapping.split(':')[0]
                self.add_prefix(ns)
                target['@id'] = defn.mappings[0]