public Builder clearWorkingDir() {
        workingDir_ = getDefaultInstance().getWorkingDir();
        bitField0_ = (bitField0_ & ~0x00000010);
        onChanged();
        return this;
      }
<pre>
Optional. If set, overrides the default DIR specified by the image.
</pre>

<code>string working_dir = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java