module Isolator::ThreadFetch
def fetch(key, fallback = :__undef__)
def fetch(key, fallback = :__undef__) raise KeyError, "key not found: #{key}" if !key?(key) && fallback == :__undef__ self[key] || fallback end
def fetch(key, fallback = :__undef__) raise KeyError, "key not found: #{key}" if !key?(key) && fallback == :__undef__ self[key] || fallback end