Firebase Docs Reference Indexable.Metadata public static interface Indexable.Metadata Represents the metadata for an Indexable. Nested Class Summary class Indexable.Metadata.Builder The builder for Indexable.Metadata. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated June 18, 2018.