code: function transformJestHelper(path, state) {
      var calleePath = path.get('callee');
      var args = path.get('arguments');
      if (!args.length) {
        return;
      }
      var moduleArg = args[0];
      if (
        moduleArg.node.type === 'StringLiteral' &&
        calleePath.node &&
        isJestProperty(t, calleePath.node.property)
      ) {
        var module = mapModule(state, moduleArg.node.value);
        if (module) {
          moduleArg.replaceWith(t.stringLiteral(module));
        }
      }
    }
docs: Transforms either individual or chained calls to `jest.dontMock('Foo')`,
  `jest.mock('Foo')`, and `jest.genMockFromModule('Foo')`.