code: function classifyParameters (parameters) {
    const { req, opts } = R.groupBy(p => p.required ? 'req' : 'opts', parameters)
    const { path, query, body } = R.groupBy(p => p.in, parameters)
  
    return {
      pathArgs: R.pluck('name', path || []),
      queryArgs: R.pluck('name', query || []),
      bodyArgs: R.pluck('name', body || []),
      req: req || [],
      opts: opts || []
    }
  }
docs: Classify given `parameters`
  @rtype (parameters: [{required: Boolean, in: String}...]) => {pathArgs: [...Object], queryArgs: [...Object], bodyArgs: [...Object], req: [...Object], opts: [...Object]}
  @param {Object[]} parameters - Parameters to classify
  @return {Object[]} Classified parameters