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This class provides methods that return pseudo-random values.It is dangerous to
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A Set is a data structure which does not allow duplicate elements.
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
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XPath provides access to the XPath evaluation environment and expressions.
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General file manipulation utilities. Facilities are provided in the following
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Abstract superclass of object loading (and querying) strategies. This class
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