get_leafs_count

Get all leaf cells name and count in the top level module, return an array 
Usage: @leaf_count = get_leafs_count;
@leaf_count: Array of leaf name and count
 ( [leaf0, cnt0], [leaf1, cnt1], ...)

Examples:

@leaf_count = get_leafs_count;
foreach my $leaf_point (@leaf_count){
   my $leaf_name = $leaf_point->[0];
   my $count = $leaf_point->[1];
   print "LEAF: $leaf_name has $count cells
";
}