public Builder mergeJobStartTime(com.google.protobuf.Timestamp value) {
      if (jobStartTimeBuilder_ == null) {
        if (((bitField0_ & 0x00200000) != 0)
            && jobStartTime_ != null
            && jobStartTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getJobStartTimeBuilder().mergeFrom(value);
        } else {
          jobStartTime_ = value;
        }
      } else {
        jobStartTimeBuilder_.mergeFrom(value);
      }
      if (jobStartTime_ != null) {
        bitField0_ |= 0x00200000;
        onChanged();
      }
      return this;
    }
<pre>
The start timestamp of the job in UTC time zone. Typically this field
is used for contracting engagements. Invalid timestamps are ignored.
</pre>

<code>.google.protobuf.Timestamp job_start_time = 22;</code>
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/Job.java