code: public Map<Object, Object> getBootstrapProperties(ResolverWrapper resolver) {
  		// return empty map
  		if(resolver.bootstrap() == null) {
  			return Collections.emptyMap();	
  		}
  		
  		// get configuration wrapper
  		ConfigurationWrapper wrapper = WrapperFactory.wrap(resolver.bootstrap());
  		
  		// bail early if nothing to do
  		if(wrapper.sources() == null || wrapper.sources().length == 0) {
  			return Collections.emptyMap();
  		}
  		
  		// obtain instance of CommonsConfiguration provider
  		CommonsConfigurationProducer instance = this.producer.get();
  		
  		// get commons configuration object from bootstrap
  		org.apache.commons.configuration.Configuration config = instance.getConfiguration(wrapper);
  		
  		// wrap as map and return
  		ConfigurationMap map = new ConfigurationMap(config);
  		return map;
  	}
docs: Get the properties used to bootstrap the resolver
  
  @param resolver
  @return