code: public OvhMigration project_serviceName_migration_migrationId_PUT(String serviceName, String migrationId, Date date) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/migration/{migrationId}";
  		StringBuilder sb = path(qPath, serviceName, migrationId);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "date", date);
  		String resp = exec(qPath, "PUT", sb.toString(), o);
  		return convertTo(resp, OvhMigration.class);
  	}
docs: Update planned migration
  
  REST: PUT /cloud/project/{serviceName}/migration/{migrationId}
  @param date [required] Migration date (RFC3339)
  @param migrationId [required] Migration id
  @param serviceName [required] Service name
  
  API beta