PropCheck.aggregate

You're seeing just the function aggregate, go back to PropCheck module for more information.
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aggregate(property, sample)

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Specs

aggregate(test(), sample()) :: test()

Same as collect/2, but accepts a list of categories under which to classify the produced test case.

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aggregate(property, printer, sample)

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Specs

aggregate(test(), stats_printer(), sample()) :: test()

Same as collect/3, but accepts a list of categories under which to classify the produced test case.