feat(*): recreate library as scoped package

base/mf_nobs.sas

@@ -0,0 +1,26 @@
+/**
+  @file
+  @brief Returns number of logical (undeleted) observations.
+  @details Beware - will not work on external database tables!
+  Is just a convenience macro for calling <code> %mf_getattrn()</code>.
+
+        %put Number of observations=%mf_nobs(sashelp.class);
+
+  <h4> Dependencies </h4>
+  @li mf_getattrn.sas
+
+  @param libds library.dataset
+
+  @return output returns result of the attrn value supplied, or log message
+    if error.
+
+
+  @version 9.2
+  @author Allan Bowe
+
+**/
+
+%macro mf_nobs(libds
+)/*/STORE SOURCE*/;
+  %mf_getattrn(&libds,NLOBS)
+%mend;