public Builder mergeScheduleTime(com.google.protobuf.Timestamp value) {
      if (scheduleTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && scheduleTime_ != null
            && scheduleTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getScheduleTimeBuilder().mergeFrom(value);
        } else {
          scheduleTime_ = value;
        }
      } else {
        scheduleTimeBuilder_.mergeFrom(value);
      }
      if (scheduleTime_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
Output only. The time that this attempt was scheduled.

`schedule_time` will be truncated to the nearest microsecond.
</pre>

<code>.google.protobuf.Timestamp schedule_time = 1;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/Attempt.java