public Builder clearRoutine() {
        routine_ = getDefaultInstance().getRoutine();
        bitField0_ = (bitField0_ & ~0x00000002);
        onChanged();
        return this;
      }
<pre>
The routine where the error occurred.
</pre>

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

@return This builder for chaining.
java-workflow-executions/proto-google-cloud-workflow-executions-v1/src/main/java/com/google/cloud/workflows/executions/v1/Execution.java