gradient_server-1.0.x-dev/modules/gradient/gradient.links.action.yml

entity.gradient.add_form:
  route_name: entity.gradient.add_page
  title: 'Add Gradient'
  appears_on:
    - entity.gradient.collection
entity.gradient_type.add_form:
  route_name: entity.gradient_type.add_form
  title: 'Add Gradient type'
  appears_on:
    - entity.gradient_type.collection