ManagedRelationshipDeleteRule deleteRuleForDeleteRuleString(String rule)

Source

static ManagedRelationshipDeleteRule deleteRuleForDeleteRuleString(
    String rule) {
  switch (rule) {
    case "cascade":
      return ManagedRelationshipDeleteRule.cascade;
    case "nullify":
      return ManagedRelationshipDeleteRule.nullify;
    case "restrict":
      return ManagedRelationshipDeleteRule.restrict;
    case "default":
      return ManagedRelationshipDeleteRule.setDefault;
  }
  return null;
}