Drupal Migrations: Basic Migration descript file for two nodes using embedded format.

basic_migration_one.yml

id: basic_migration_one
label: 'Custom Basic Migration 2000'
source:
  plugin: embedded_data
  data_rows:
    -
      unique_id: 1
      page_title: 'Title for migrated node - One'
      page_content: 'Lorem fistrum mamaar se calle ustée tiene musho pelo.'
    -
      unique_id: 2
      page_title: 'Title for migrated node - Two'
      page_content: 'Se calle ustée caballo blanco caballo negroorl.'
  ids:
    unique_id:
      type: integer
process:
  title: article_title
  body: article_content
destination:
  plugin: 'entity:node'
  default_bundle: page