public Builder setUpdateMask(com.google.protobuf.FieldMask value) {
      if (updateMaskBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        updateMask_ = value;
      } else {
        updateMaskBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
Strongly recommended for the best service experience.

If [update_mask][google.cloud.talent.v4beta1.UpdateJobRequest.update_mask]
is provided, only the specified fields in
[job][google.cloud.talent.v4beta1.UpdateJobRequest.job] are updated.
Otherwise all the fields are updated.

A field mask to restrict the fields that are updated. Only
top level fields of [Job][google.cloud.talent.v4beta1.Job] are supported.
</pre>

<code>.google.protobuf.FieldMask update_mask = 2;</code>
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/UpdateJobRequest.java