How to use the @atomist/sdm.mapKeyToGoal function in @atomist/sdm

function isDirectlyDependentOn(successfulGoal: SdmGoalKey, goal: SdmGoalEvent): boolean {
    if (!goal) {
        logger.warn("Internal error: Trying to work out if %j is dependent on null or undefined goal", successfulGoal);
        return false;
    }
    if (!goal.preConditions || goal.preConditions.length === 0) {
        return false; // no preconditions? not dependent
    }
    if (mapKeyToGoal(goal.preConditions)(successfulGoal)) {
        logger.debug("%s depends on %s", goal.uniqueName, successfulGoal.uniqueName);
        return true; // the failed goal is one of my preconditions? dependent
    }
    return false;
}

function isDirectlyDependentOn(successfulGoal: SdmGoalKey, goal: SdmGoalEvent): boolean {
    if (!goal) {
        return false;
    }
    if (!goal.preConditions || goal.preConditions.length === 0) {
        return false; // no preconditions? not dependent
    }
    if (mapKeyToGoal(goal.preConditions)(successfulGoal)) {
        logger.debug("%s depends on %s", goal.uniqueName, successfulGoal.uniqueName);
        return true; // the failed goal is one of my preconditions? dependent
    }
    return false;
}

function isDependentOn(failedGoal: SdmGoalKey, goal: SdmGoalEvent, preconditionToGoal: (g: SdmGoalKey) => SdmGoalEvent): boolean {
    if (!goal) {
        return false;
    }
    if (!goal.preConditions || goal.preConditions.length === 0) {
        return false; // no preconditions? not dependent
    }
    if (mapKeyToGoal(goal.preConditions)(failedGoal)) {
        return true; // the failed goal is one of my preconditions? dependent
    }
    // otherwise, recurse on my preconditions
    return !!goal.preConditions
        .map(precondition => isDependentOn(failedGoal, preconditionToGoal(precondition), preconditionToGoal))
        .find(a => a); // if one is true, return true
}

        const goalsToSkip = goals.filter(g => isDependentOn(failedGoal, g, mapKeyToGoal(goals)))
            .filter(g => g.state === "planned");