code: function overrideObjectFunctions(curr, old) {
      if (!old) {
          return curr;
      }
  
      if (!curr && curr !== undefined) {
          return old;
      }
  
      let result = {};
      Object.keys(curr).forEach(k => {
          let v = curr[k];
          let oldV = old[k];
          if (typeof v === 'function' && typeof oldV === 'function') {
              let currV = v;
              v = function (...args) {
                  oldV.apply(this, args);
                  currV.apply(this, args);
              };
          }
          result[k] = v;
      });
  
      return result;
  }
docs: Override the function value for the given object
  
  @param {?Object} curr the current object
  @param {?Object} old the old object
  @return {?Object}