text: // Copyright 2019 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     https://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  // Note: this file is purely for documentation. Any contents are not expected
  // to be loaded as the JS file.
  
  /**
   * A Timestamp represents a point in time independent of any time zone or local
   * calendar, encoded as a count of seconds and fractions of seconds at
   * nanosecond resolution. The count is relative to an epoch at UTC midnight on
   * January 1, 1970, in the proleptic Gregorian calendar which extends the
   * Gregorian calendar backwards to year one.
   *
   * All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
   * second table is needed for interpretation, using a [24-hour linear
   * smear](https://developers.google.com/time/smear).
   *
   * The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
   * restricting to that range, we ensure that we can convert to and from [RFC
   * 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
   *
   * # Examples
   *
   * Example 1: Compute Timestamp from POSIX `time()`.
   *
   *     Timestamp timestamp;
   *     timestamp.set_seconds(time(NULL));
   *     timestamp.set_nanos(0);
   *
   * Example 2: Compute Timestamp from POSIX `gettimeofday()`.
   *
   *     struct timeval tv;
   *     gettimeofday(&tv, NULL);
   *
   *     Timestamp timestamp;
   *     timestamp.set_seconds(tv.tv_sec);
   *     timestamp.set_nanos(tv.tv_usec * 1000);
   *
   * Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
   *
   *     FILETIME ft;
   *     GetSystemTimeAsFileTime(&ft);
   *     UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
   *
   *     // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
   *     // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
   *     Timestamp timestamp;
   *     timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
   *     timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
   *
   * Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
   *
   *     long millis = System.currentTimeMillis();
   *
   *     Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
   *         .setNanos((int) ((millis % 1000) * 1000000)).build();
   *
   *
   * Example 5: Compute Timestamp from current time in Python.
   *
   *     timestamp = Timestamp()
   *     timestamp.GetCurrentTime()
   *
   * # JSON Mapping
   *
   * In JSON format, the Timestamp type is encoded as a string in the
   * [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
   * format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
   * where {year} is always expressed using four digits while {month}, {day},
   * {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
   * seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
   * are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
   * is required. A proto3 JSON serializer should always use UTC (as indicated by
   * "Z") when printing the Timestamp type and a proto3 JSON parser should be
   * able to accept both UTC and other timezones (as indicated by an offset).
   *
   * For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
   * 01:30 UTC on January 15, 2017.
   *
   * In JavaScript, one can convert a Date object to this format using the
   * standard
   * [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
   * method. In Python, a standard `datetime.datetime` object can be converted
   * to this format using
   * [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
   * the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
   * the Joda Time's [`ISODateTimeFormat.dateTime()`](https://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D) to obtain a formatter capable of generating timestamps in this format.
   *
   * @property {number} seconds
   *   Represents seconds of UTC time since Unix epoch
   *   1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
   *   9999-12-31T23:59:59Z inclusive.
   *
   * @property {number} nanos
   *   Non-negative fractions of a second at nanosecond resolution. Negative
   *   second values with fractions must still have non-negative nanos values
   *   that count forward in time. Must be from 0 to 999,999,999
   *   inclusive.
   *
   * @typedef Timestamp
   * @memberof google.protobuf
   * @see [google.protobuf.Timestamp definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/timestamp.proto}
   */
  const Timestamp = {
    // This is for documentation. Actual contents will be loaded by gRPC.
  };