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currently not documented; only the argument list is
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Warning: This function is
EXPERIMENTAL. The behaviour of this function, the
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Returns the miter limit. When two line segments meet at a sharp angle and miter joins have been specified for 'lineJoin', it is possible for the miter to extend far beyond the thickness of the line stroking the path. The miterLimit' imposes a limit on the ratio of the miter length to the 'lineWidth'.
Return Values
Returns an int describing the miter limit
and 0 if no miter limit is set.