Clone on DefaultTreeMatrix not Implemented

[demongolem]

I am looking for a way to clone a TreeMatrix type object, but when I call clone on my DefaultTreeMatrix, I get a not implemented error:

Exception in thread "main" java.lang.RuntimeException: not implemented
at org.ujmp.core.treematrix.DefaultTreeMatrix.availableCoordinates(DefaultTreeMatrix.java:62)
at org.ujmp.core.objectmatrix.calculation.Convert.calcNew(Convert.java:35)
at org.ujmp.core.objectmatrix.calculation.Convert.calcNew(Convert.java:46)
at org.ujmp.core.AbstractMatrix.clone(AbstractMatrix.java:416)
at UjmpTreeMatrix.createRootedSubtrees(UjmpTreeMatrix.java:30)
at UjmpTreeMatrix.main(UjmpTreeMatrix.java:54)

Is there another way to accomplish this same task or can we get an implementation of this method?