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<p>Executes the algorithm until a condition is met.</p>
<dl class="section pre"><dt>Precondition</dt><dd><a class="el" href="a00255.html#a02fd73d861ef2e4aabb38c0c9ff82947" title="Initializes the internal data structures. ">init()</a> must be called and at least one node should be added with <a class="el" href="a00255.html#a2182689d44252eb7533da9b0ae81ca84" title="Adds a new source