public Builder clearFilter() {
      filter_ = getDefaultInstance().getFilter();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
Required. The filter expression. The expression must be in the format: &lt;field&gt;
&lt;operator&gt; &lt;value&gt;.
Supported field: 'finding_type'.
Supported operator: '='.
</pre>

<code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1alpha/src/main/java/com/google/cloud/websecurityscanner/v1alpha/ListFindingsRequest.java