public com.google.protobuf.ByteString getJobIdBytes() {
    java.lang.Object ref = jobId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      jobId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
public com . google . protobuf . ByteString getJobIdBytes ( ) { java . lang . Object ref = jobId_ ; if ( ref instanceof java . lang . String ) { com . google . protobuf . ByteString b = com . google . protobuf . ByteString . copyFromUtf8 ( ( java . lang . String ) ref ) ; jobId_ = b ; return b ; } else { return ( com . google . protobuf . ByteString ) ref ; } }
<pre>
Optional. The job ID, which must be unique within the project. The job ID
is generated by the server upon job submission or provided by the user as a
means to perform retries without creating duplicate jobs. The ID must
contain only letters (a-z, A-Z), numbers (0-9), underscores (_), or
hyphens (-). The maximum length is 100 characters.
</pre>

<code>string job_id = 2;</code>