def METHOD_NAME(self, m: Dict) -> None:
    """
    Populate `prefix_map` with contents from a JSON-LD context from self.url
    Parameters
    ----------
    m: dict
        Dictionary of prefix to URI mappings
    """
    self.prefix_map = {}
    for k, v in m.items():
        if isinstance(v, str):
            self.prefix_map[k] = v
        else:
            self.prefix_map[k] = v.get("@id")
    if "biolink" not in self.prefix_map:
        self.prefix_map["biolink"] = (
            self.prefix_map["@vocab"]
            if "@vocab" in self.prefix_map
            else "https://w3id.org/biolink/vocab/"
        )
    if "owlstar" not in self.prefix_map:
        self.prefix_map["owlstar"] = "http://w3id.org/owlstar/"
    if "@vocab" in self.prefix_map:
        del self.prefix_map["@vocab"]
    if "MONARCH" not in self.prefix_map:
        self.prefix_map["MONARCH"] = "https://monarchinitiative.org/"
        self.prefix_map["MONARCH_NODE"] = "https://monarchinitiative.org/MONARCH_"
    if "" in self.prefix_map:
        log.info(
            f"Replacing default prefix mapping from {self.prefix_map['']} to 'www.example.org/UNKNOWN/'"
        )
    else:
        self.prefix_map[""] = self.DEFAULT_NAMESPACE
    self.reverse_prefix_map = {y: x for x, y in self.prefix_map.items()}