eca-1.0.x-dev/modules/content/config/schema/eca_content.entity_reference.schema.yml

# Schema for the 'eca_content_event' selection handler settings.

entity_reference_selection.eca:
  type: entity_reference_selection
  label: 'Handler settings of event-based selection with ECA'
  mapping:
    field_name:
      type: string
      label: 'Field machine name'