r words, this method
 represents the logarithm of the probability mass function (PMF) for the
 distribution. Note that due to the floating point precision and
 under/overflow issues, this method will for some distributions be more
 precise and faster than computing the logarithm of
 <a href="../../../../../org/apache/commons/math3/distribution/IntegerDistribution.html#probability(int)"><code>IntegerDistribution.probability(int)</code></a>.
 <p>
 The default implementation simply computes the logarithm of <c