pm-4.1.x-dev/modules/pm_expense/pm_expense.links.action.yml

pm_expense.type_add:
  title: 'Add Expense type'
  route_name: entity.pm_expense_type.add_form
  appears_on:
    - entity.pm_expense_type.collection

pm_expense.add_page:
  title: 'Add Expense'
  route_name: entity.pm_expense.add_page
  appears_on:
    - entity.pm_expense.collection
    - view.pm_expense.collection
    - entity.pm_project.canonical