CodePen: 'pobem' is not a valid postcss plugin

[ilyar]

I think that the reason is that the plug-in does not correspond to the manual and is absent in the plug-in repository.

Setup

CSS Preprocessor: PostCSS http://codepen.io/ilyar/pen/dvJVaa

Actual result

http://codepen.io/ilyar/pen/dvJVaa.css

@use pobem;

:block(block)
{
   color: #0f0;
}
// 'pobem' is not a valid postcss plugin.

Expected Result

.block
{
   color: #0f0;
}

rebem/css#5