Written by stakr GbR (Jan Sebastian Siwy, Martin Spickermann, Henning Staib GbR; http://www.stakr.de/)
Source: https://github.com/stakr/require_api
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Copyright (c) 2009 stakr GbR (Jan Sebastian Siwy, Martin Spickermann, Henning Staib GbR), released under the MIT license