) -> Dependant:
    if visited is None:
        visited = []
    visited.append(dependant.cache_key)
    use_parent_oauth_scopes = (parent_oauth_scopes or []) + (
        dependant.oauth_scopes or []
    )

    flat_dependant = Dependant(
        path_params=dependant.path_params.copy(),
        query_params=dependant.query_params.copy(),
        header_params=dependant.header_params.copy(),

        # Merge scopes for the same security scheme
        if security_name not in operation_security_dict:
            operation_security_dict[security_name] = []
        for scope in security_dependency.oauth_scopes or []:
            if scope not in operation_security_dict[security_name]:
                operation_security_dict[security_name].append(scope)
    operation_security = [