lambda function in yaml

services.yml

  elastic_document_structure_helper:
    class: SAVerlag\SearchBundle\Logic\ElasticDocumentStructureHelper
    calls:
      - [addEntityWantedFields, ['SAVerlag\FinderBundle\Entity\Certificate', ['type', 'other_type_name']]]
      - [addEntityWantedFields, ['SAVerlag\FinderBundle\Entity\Company', ['id', 'name', 'employees_craft_total',  'employees_tech_total', 'employees_total', 'short_description', 'description', 'specialization', 'funding_year', 'action_radius', 'action_radius_distance', 'email', 'phone', 'fax', 'turnover', 'contract_volume_min', 'contract_volume_max']]]
      - [addEntityWantedFields, ['SAVerlag\FinderBundle\Entity\Project', {'project_name': 'name', 'project_description': 'description', 'project_segment': 'segment_id', 0: 'executed_activities_text', 1: 'contract_volume', 2: 'builder', 3: 'architect'}]]
      - [addEntityWantedFields, ['SAVerlag\FinderBundle\Entity\Location', ['street', 'zip_code', 'city', 'longitude', 'latitude']]]
      - [addEntityWantedFields, ['SAVerlag\FinderBundle\Entity\Membership', ['type', 'other_type_name']]]