@Override
        public int hashCode() {
            return java.util.Objects.hash(indexFacts,
                                          schemaInfo,
                                          rendererRegistry, tokenRegistry, searchChainRegistry,
                                          detailedDiagnostics, breakdown,
                                          linguistics,
                                          executor);
        }
The brutal version of populateFrom().

@param other a Context instance this will copy all state from
container-search/src/main/java/com/yahoo/search/searchchain/Execution.java