Arrays.<Symbol>asList(name_ref, Literal.newLiteral("Arthur"))
)));
// update characters set name='mostly harmless' where name='Arthur' and "_version"=?
WhereClause whereClause = new WhereClause(whereClauseFunction);
whereClause.version(1L);
ESUpdateNode updateNode = new ESUpdateNode(
new String[]{"characters"},
new HashMap<Reference, Symbol>(){{
put(name_ref, Literal.newLiteral("mostly harmless"));
}},