anchor.diff:              columns={columns}
               filters={filters}
               selectable={true}
  -            onSelectedRowsChange={this.updateSelectedStudents}
  +            onSelectedRowsChange={this.props.onSelectedStudentsChange}
               search_placeholder={'<%= j raw I18n.t('students.search_students') %>'} />
             </div>
           </div>
  
positive.code:           <AddGroupButton refresh={this.props.refresh} />
            <div className={'wrapRightGroups'}>
              <Table data={groups_data} columns={columns} filters={filters} 
                search_placeholder={'<%= j raw I18n.t('groups.search_groups') %>'} />
            </div>
          </div>
  
negative.code: 
    // Table of students, on the left.
    var GroupsStudentsTable = React.createClass({
      /*
      updateSelectedStudents: function(students) {
        this.props.onSelectedStudentsChange(students)
      },
      */
      render: function() {
        var columns = [
        {
  