public Builder clearFilter() {
      filter_ = getDefaultInstance().getFilter();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
Optional. Filtering only supports equality on deployment state.
It should be in the form: "state = DRAFT". `OR` operator can be used to
get response for multiple states. e.g. "state = DRAFT OR state = APPLIED".
</pre>

<code>string filter = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@return This builder for chaining.
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/ListDeploymentsRequest.java