public SolrCell(CommandBuilder builder, Config config, Command parent, Command child, MorphlineContext context) {
super(builder, config, parent, child, context);
Config solrLocatorConfig = getConfigs().getConfig(config, "solrLocator");
SolrLocator locator = new SolrLocator(solrLocatorConfig, context);
LOG.debug("solrLocator: {}", locator);
this.schema = locator.getIndexSchema();
Preconditions.checkNotNull(schema);
LOG.trace("Solr schema: \n{}", Joiner.on("\n").join(new TreeMap(schema.getFields()).values()));
ListMultimap<String, String> cellParams = ArrayListMultimap.create();
String uprefix = getConfigs().getString(config, ExtractingParams.UNKNOWN_FIELD_PREFIX, null);