code: function _mergeOpts(allOptions, childFieldName) {
    var finalOpts = {};
    allOptions = _normalizeOpts(allOptions);
    var name;
  
    for (name in allOptions) {
      if (name !== childFieldName) {
        finalOpts[name] = allOptions[name];
      }
    }
  
    //merge in the per type settings for the childFieldName
    if (childFieldName && allOptions[childFieldName]) {
      for (name in allOptions[childFieldName]) {
        finalOpts[name] = allOptions[childFieldName][name];
      }
    }
    return finalOpts;
  }
docs: merges child options up with the parent options object Example: obj = {a: 1, b: {a: 2}} mergeOpts(obj, 'b')  Returns: {a: 2}