int numRowsLocal = method.reserveLocal(meansLocal);
int rowLocal = method.reserveLocal(1);
int counterLocal = method.reserveLocal(1);
mv.visitInsn(ICONST_0);
numRows.pushInt(method);
mv.visitInsn(DUP);
mv.visitVarInsn(ISTORE, numRowsLocal);
// create array (size still on stack)
mv.visitIntInsn(NEWARRAY, T_DOUBLE);