Ignoring records

First of all, thanks for being so passionate about what you do.
Let's say we have a file with 5 records:
sdksdkdfksd
dsfsdlflldfllld
dfsdffdfsdfsf
sdf;sd;ds;sdll
sdfsffddsdsff
And we want to ignore n records from beginning and k records from the end without counting empty lines, is there a way to do it in cobrix with some options for example option("ignore_beginning_records", n), option("ignore_end_records", k)?