field_group-8.x-3.1/config/schema/field_group.entity_display.schema.yml

core.entity_view_display.*.*.*.third_party.field_group:
  type: sequence
  label: 'Field group settings on entity view'
  sequence:
    type: mapping
    label: A field group
    mapping:
      children:
        type: sequence
        label: 'The fields belonging to the group'
        sequence:
          type: string
          label: 'The field name'
      label:
        type: label
        label: Readable name of the group
      parent_name:
        type: string
        label: 'The parent group of this group'
      region:
        type: string
        label: 'The region of this group'
      weight:
        type: integer
        label: 'The weight of the group'
      format_type:
        type: string
        label: 'The formatter of the group'
      format_settings:
        type: field_group.field_group_formatter_plugin.[%parent.format_type]

core.entity_form_display.*.*.*.third_party.field_group:
  type: sequence
  label: 'Field group settings on entity form'
  sequence:
    type: mapping
    label: A field group
    mapping:
      children:
        type: sequence
        label: 'The fields belonging to the group'
        sequence:
          type: string
          label: 'The field name'
      label:
        type: label
        label: Readable name of the group
      region:
        type: string
        label: 'The region of this group'
      parent_name:
        type: string
        label: 'The parent group of this group'
      weight:
        type: integer
        label: 'The weight of the group'
      format_type:
        type: string
        label: 'The formatter of the group'
      format_settings:
        type: field_group.field_group_formatter_plugin.[%parent.format_type]