ActiveSupport::JSON.method(:encode).source_location
["/Users/me/Work/railsproject/bundle/jruby/1.9/gems/activesupport-3.2.13/lib/active_support/json/encoding.rb", 30]
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ActiveSupport::JSON.method(:encode).source_location
["/Users/me/Work/railsproject/bundle/jruby/1.9/gems/activesupport-3.2.13/lib/active_support/json/encoding.rb", 30]