Write a class that keeps track of groups and group members (Javascript)

The class should track names of the groups, a group leader and group members.

Each group should look like: { name: 'Group Name' leader: 'Leader Name' members: ['Name 1', Name 2'] }

The class should have the following methods:

constructor: accepts an array of group objects or if nothing is passed - defaults to an empty array

addGroup(group): adds a group

removeGroup(groupName): removes a group by the name of the group