public int getChangelogMaxMsgSizeBytes(String storeName) {
    return getInt(String.format(CHANGELOG_MAX_MSG_SIZE_BYTES, storeName), DEFAULT_CHANGELOG_MAX_MSG_SIZE_BYTES);
  }
Gets the serialized instance of SideInputsProcessor associated with the {@code storeName}.

@param storeName name of the store
@return the serialized instance of SideInputsProcessor if present, empty optional otherwise
samza-core/src/main/java/org/apache/samza/config/StorageConfig.java