public static com.google.cloud.visionai.v1.ListCorporaRequest parseFrom(
      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
<pre>
The filter applied to the returned corpora list.
Only the following restrictions are supported:
`type=&lt;Corpus.Type&gt;`,
`type!=&lt;Corpus.Type&gt;`.
</pre>

<code>string filter = 5;</code>

@return The bytes for filter.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ListCorporaRequest.java