# Hierarchy For Package com.google.adk.a2a.common

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - com.google.adk.a2a.common.A2AMetadata
  - java.lang.Throwable (implements java.io.Serializable)
    - java.lang.Exception
      - java.lang.RuntimeException
        - com.google.adk.a2a.common.A2AClientError
        - com.google.adk.a2a.common.GenAiFieldMissingException

## Enum Class Hierarchy

- java.lang.Object
  - java.lang.Enum<E> (implements java.lang.Comparable<T>, java.lang.constant.Constable, java.io.Serializable)
    - com.google.adk.a2a.common.A2AMetadata.Key