How to use the srsly.ruamel_yaml.constructor.DuplicateKeyError function in srsly

node.start_mark,
                        'found duplicate key "{}"'.format(key_node.value),
                        key_node.start_mark,
                        """
                        To suppress this check see:
                           http://yaml.readthedocs.io/en/latest/api.html#duplicate-keys
                        """,
                        """\
                        Duplicate keys will become an error in future releases, and are errors
                        by default when using the new API.
                        """,
                    ]
                    if self.allow_duplicate_keys is None:
                        warnings.warn(DuplicateKeyFutureWarning(*args))
                    else:
                        raise DuplicateKeyError(*args)
                del node.value[index]
                if isinstance(value_node, MappingNode):
                    merge_map_list.append((index, constructed(value_node)))
                    # self.flatten_mapping(value_node)
                    # merge.extend(value_node.value)
                elif isinstance(value_node, SequenceNode):
                    # submerge = []
                    for subnode in value_node.value:
                        if not isinstance(subnode, MappingNode):
                            raise ConstructorError(
                                "while constructing a mapping",
                                node.start_mark,
                                "expected a mapping for merging, but found %s"
                                % subnode.id,
                                subnode.start_mark,
                            )

'found duplicate key "{}" with value "{}" '
                    '(original value: "{}")'.format(key, value, mk),
                    key_node.start_mark,
                    """
                    To suppress this check see:
                        http://yaml.readthedocs.io/en/latest/api.html#duplicate-keys
                    """,
                    """\
                    Duplicate keys will become an error in future releases, and are errors
                    by default when using the new API.
                    """,
                ]
                if self.allow_duplicate_keys is None:
                    warnings.warn(DuplicateKeyFutureWarning(*args))
                else:
                    raise DuplicateKeyError(*args)
            return False
        return True

node.start_mark,
                        'found duplicate key "{}"'.format(key_node.value),
                        key_node.start_mark,
                        """
                        To suppress this check see:
                           http://yaml.readthedocs.io/en/latest/api.html#duplicate-keys
                        """,
                        """\
                        Duplicate keys will become an error in future releases, and are errors
                        by default when using the new API.
                        """,
                    ]
                    if self.allow_duplicate_keys is None:
                        warnings.warn(DuplicateKeyFutureWarning(*args))
                    else:
                        raise DuplicateKeyError(*args)
                del node.value[index]
                if isinstance(value_node, MappingNode):
                    self.flatten_mapping(value_node)
                    merge.extend(value_node.value)
                elif isinstance(value_node, SequenceNode):
                    submerge = []
                    for subnode in value_node.value:
                        if not isinstance(subnode, MappingNode):
                            raise ConstructorError(
                                "while constructing a mapping",
                                node.start_mark,
                                "expected a mapping for merging, but found %s"
                                % subnode.id,
                                subnode.start_mark,
                            )
                        self.flatten_mapping(subnode)

node.start_mark,
                    'found duplicate key "{}"'.format(key),
                    key_node.start_mark,
                    """
                    To suppress this check see:
                        http://yaml.readthedocs.io/en/latest/api.html#duplicate-keys
                    """,
                    """\
                    Duplicate keys will become an error in future releases, and are errors
                    by default when using the new API.
                    """,
                ]
                if self.allow_duplicate_keys is None:
                    warnings.warn(DuplicateKeyFutureWarning(*args))
                else:
                    raise DuplicateKeyError(*args)