Make sure you view the correct docs: latest release, master.

General purpose Ruby library used by Sinatra 2.0, Mustermann and related projects.

Included:

• Decoration - Mixin for easy method decorations.
• EqualityMap - Weak reference caching based on key equality.
• ThreadLocal - True thread locals that are properly garbage collected.
• WarningFilter - Enable Ruby's warnings, but filter out those caused by third party gems.