docs: function mergeConfig(/* config objects ... */) {
  	return helpers$1.merge({}, [].slice.call(arguments), {
  		merger: function(key, target, source, options) {
  			var tval = target[key] || {};
  			var sval = source[key];
  
  			if (key === 'scales') {
  				// scale config merging is complex. Add our own function here for that
  				target[key] = mergeScaleConfig(tval, sval);
  			} else if (key === 'scale') {
  				// used in polar area & radar charts since there is only one scale
  				target[key] = helpers$1.merge(tval, [core_scaleService.getScaleDefaults(sval.type), sval]);
  			} else {
  				helpers$1._merger(key, target, source, options);
  			}
  		}
  	});
  }