path.isAbsolute wrong output

[xenon-ua]

node: v5.10.0
platform: Windows x64 v10.0.10586

In the documentation specified that path.isAbsolute('//server') should return true. But this command returns false on my platform:

[ChALkeR]

Please provide an example with steps to reproduce (including your OS), the expected output and the actual output.

Update: the original post has been updated since this comment, it's fine now.