Please help to understand different types of errors

[jayyren]

Hi all!
Recently I was dealing with errors handling and found out that common ApolloError type in lib

export declare class ApolloError extends Error {
    name: string;
    message: string;
    graphQLErrors: ReadonlyArray<GraphQLFormattedError>;
    protocolErrors: ReadonlyArray<{
        message: string;
        extensions?: GraphQLErrorExtensions[];
    }>;
    clientErrors: ReadonlyArray<Error>;
    networkError: Error | ServerParseError | ServerError | null;
    /**
     * Indicates the specific original cause of the error.
     *
     * This field contains the first available `networkError`, `graphQLError`, `protocolError`, `clientError`, or `null` if none are available.
     */
    cause: ({
        readonly message: string;
        extensions?: GraphQLErrorExtensions[] | GraphQLFormattedError["extensions"];
    } & Omit<Partial<Error> & Partial<GraphQLFormattedError>, "extensions">) | null;
    extraInfo: any;
    constructor({ graphQLErrors, protocolErrors, clientErrors, networkError, errorMessage, extraInfo, }: ApolloErrorOptions);
}

BUT I also log all errors in angular provider using onError function which according to https://the-guild.dev/graphql/apollo-angular/docs/data/error-handling returns only these types of errors below

Error Link takes a function that is called in the event of an error. This function is called with an object containing the following keys:

operation: The Operation that errored
response: The response from the server
graphQLErrors: An array of errors from the GraphQL endpoint
networkError: any error during the link execution or server response

So does it mean that onError function has lack of output or these protocolErrors and clientErrors in ApolloError type supposed to be catched other way?
Still I couldn't redproduce any of these error types on the project and don't understand in what case scenarios they are used