code: function validateDeep(map) {
    if (!(map instanceof Map)) {
      throw new Error(`Invalid graph: Expected Map instead found ${typeof map}`);
    }
  
    map.forEach((value, key) => {
      if (typeof value === 'object' && value instanceof Map) {
        validateDeep(value);
        return;
      }
  
      if (typeof value !== 'number' || value <= 0) {
        throw new Error(`Values must be numbers greater than 0. Found value ${value} at ${key}`);
      }
    });
  }
docs: Validate a map to ensure all it's values are either a number or a map
  
  @param {Map} map - Map to valiadte