getMatrix R -- pops a matrix over R from the top of the engine's stack and returns it.
Intended for internal use only.
Code:
-- ../../../Macaulay2/m2/matrix.m2:53-56 getMatrix = (R) -> newMatrix( (sendgg(ggdup,gggetrows); new Module from R), (sendgg(ggdup,gggetcols); new Module from R) )