lib/index.js
function strict(query) {
  return foldl(function(acc, val, key) {
    if (has.call(allowedKeys, key)) acc[key] = val;
    return acc;
  }, {}, utm(query));
}
function strict(query) {
  return foldl(function(acc, val, key) {
    if (has.call(allowedKeys, key)) acc[key] = val;
    return acc;
  }, {}, utm(query));
}
function strict ( query ) { return foldl ( function ( acc , val , key ) { if ( has . call ( allowedKeys , key ) ) acc [ key ] = val ; return acc ; } , { } , utm ( query ) ) ; }
Get strict utm params - from the given `querystring`

@param {String} query
@return {Object}
@api private
Get strict utm params - from the given querystring