eca-1.0.x-dev/modules/cache/eca_cache.services.yml

services:
  cache.eca_memory:
    class: Drupal\Core\Cache\MemoryCache\MemoryCache
    arguments:
      - '@datetime.time'
  cache.eca_default:
    class: Drupal\Core\Cache\CacheBackendInterface
    tags:
      - { name: cache.bin }
    factory: ['@cache_factory', 'get']
    arguments:
      - eca_default
  cache.eca_chained:
    class: Drupal\Core\Cache\BackendChain
    calls:
      - [appendBackend, ['@cache.eca_memory']]
      - [appendBackend, ['@cache.eca_default']]
    tags:
      - { name: cache.bin }