public Builder clearVertexParallelism() {
        bitField0_ = (bitField0_ & ~0x00001000);
        vertexParallelism_ = 0;
        onChanged();
        return this;
      }
<pre>
An internal field required for Tez.
</pre>

<code>optional int32 vertex_parallelism = 13;</code>
@return This builder for chaining.
llap-common/src/gen/protobuf/gen-java/org/apache/hadoop/hive/llap/daemon/rpc/LlapDaemonProtocolProtos.java