{% assign version = page.url | split: '/' %}
{% assign current_version = version[1] %}
{% if current_version == '' or current_version contains '.html' or current_version contains '.md' %}
{% assign current_version = 'v0.9' %}
{% endif %}
{% if current_version == 'v0.9' or current_version == 'v0.8' or current_version == 'v0.7' or current_version == 'v0.6' or current_version == 'v0.5' or current_version ==
'v0.4' or current_version ==
'v0.2' %}
{% endif %}