// Original file: deps/googleapis/google/api/field_behavior.proto

/**
 * An indicator of the behavior of a given field (for example, that a field
 * is required in requests, or given as output but ignored as input).
 * This **does not** change the behavior in protocol buffers itself; it only
 * denotes the behavior and may affect how API tooling handles the field.
 * 
 * Note: This enum **may** receive new values in the future.
 */
export enum FieldBehavior {
  /**
   * Conventional default for enums. Do not use this.
   */
  FIELD_BEHAVIOR_UNSPECIFIED = 0,
  /**
   * Specifically denotes a field as optional.
   * While all fields in protocol buffers are optional, this may be specified
   * for emphasis if appropriate.
   */
  OPTIONAL = 1,
  /**
   * Denotes a field as required.
   * This indicates that the field **must** be provided as part of the request,
   * and failure to do so will cause an error (usually `INVALID_ARGUMENT`).
   */
  REQUIRED = 2,
  /**
   * Denotes a field as output only.
   * This indicates that the field is provided in responses, but including the
   * field in a request does nothing (the server *must* ignore it and
   * *must not* throw an error as a result of the field's presence).
   */
  OUTPUT_ONLY = 3,
  /**
   * Denotes a field as input only.
   * This indicates that the field is provided in requests, and the
   * corresponding field is not included in output.
   */
  INPUT_ONLY = 4,
  /**
   * Denotes a field as immutable.
   * This indicates that the field may be set once in a request to create a
   * resource, but may not be changed thereafter.
   */
  IMMUTABLE = 5,
}