Sidebar component not working when visible by default

[konrad147]

I'm submitting a ... (check one with "x")

[x ] bug report
[ ] feature request
[ ] support request => Please do not submit support request here, instead see https://forum.primefaces.org/viewforum.php?f=57

Plunkr Case (Bug Reports)

https://plnkr.co/edit/DUHlLW0JQFj3RdLtg4WF?p=preview

Current behavior
Creating a component throws an error "TypeError: this.show is not a function"

Expected behavior
Sidebar is being displayed

Minimal reproduction of the problem with instructions
Use sidebar component with primereact 2.0.0 beta 8

<Sidebar visible={true} onHide={() => null}>
Sidebar content
</Sidebar>

Please tell us about your environment:
Windows, node 8

• React version:
  16.3.0

• PrimeReact version:
  2.0.0 beta 8

• Browser: all

• Language: all