Tree view

      <div style={{width: '300px'}}>
        <TreeView label="Tree View">
          <TreeNode
            key='1'
            id='1'
            value='Artificial intelligence'
            label={<span>Artificial intelligence</span>}
          />
          <TreeNode
            key='2'
            id='2'
            value='Blockchain'
            label='Blockchain'
          />
          <TreeNode
            key='3'
            id='3'
            value='Business automation'
            label='Business automation'
          >
            <TreeNode
              key='3-1'
              id='3-1'
              value='Business process automation'
              label='Business process automation'
            />
            <TreeNode
              key='3-2'
              id='3-2'
              value='Business process mapping'
              label='Business process mapping'
            />
          </TreeNode>
          <TreeNode
            key='4'
            id='4'
            value='Business operations'
            label='Business operations'
          />
          <TreeNode
            key='5'
            id='5'
            value='Cloud computing'
            label='Cloud computing'
            isExpanded={true}
          >
            <TreeNode
              key='5-1'
              id='5-1'
              value='Containers'
              label='Containers'
            />
            <TreeNode
              key='5-2'
              id='5-2'
              value='Databases'
              label='Databases'
            />
            <TreeNode
              key='5-3'
              id='5-3'
              value='DevOps'
              label='DevOps'>
                <TreeNode
                  key='5-4'
                  id='5-4'
                  value='Solutions'
                  label='Solutions'
                />
                <TreeNode
                  key='5-5'
                  id='5-5'
                  value='Case studies'
                  label='Case studies'>
                  <TreeNode
                      key='5-6'
                      id='5-6'
                      value='Resources'
                      label='Resources'
                  />
                </TreeNode>
            </TreeNode>
          </TreeNode>
          <TreeNode
            key='6'
            id='6'
            value='Data & Analytics'
            label='Data & Analytics'>
            <TreeNode
              key='6-1'
              id='6-1'
              value='Big data'
              label='Big data'
            />
            <TreeNode
              id='6-2'
              value='Business intelligence'
              label='Business intelligence'
            />
          </TreeNode>
        </TreeView>
      </div>