code: function(id, key, value) {
        if(!memStore[id]) {
          memStore[id] = {};
        }
  
        if(typeof key === 'string' && typeof value !== 'undefined') {
          memStore[id][key] = value;
          return memStore[id][key];
        } else {
          throw new Error('invalid data type or missing value');
          return false;
        }
      }
docs: Store key/value data.
  
  @function
  @param {String} id
  @param {String} key
  @param {(String|Number|Boolean|Array|Object)} value
  @returns {(String|Number|Boolean|Array|Object)}