cted within defined relative error (64
machine epsilons). That means the more mantissa bits the user provided
fpt_type has the better precision of the output geometries will be. In
order for the user defined traits to be consistent with the default
Voronoi builder predicates user should define following set of
coordinate types (the assumption is made that input geometries have
X-bit signed integer coordinate type):<br>
      <br>
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