contacts-8.x-1.x-dev/modules/group/config/schema/contacts_group.schema.yml

contacts_org_relationship_form:
  type: block_settings
  label: 'Org Relationship Form'
  mapping:
    query_key:
      type: string
      lable: 'Query key'
    provides:
      type: string
      label: 'Provides'
    content_roles:
      type: sequence
      sequence:
        type: string
        label: 'Member roles'

block.settings.contacts_org_relationship_form:*:
  type: contacts_org_relationship_form

block.settings.contacts_org_relationship_form:
  type: contacts_org_relationship_form