feat(*): recreate library as scoped package

base/mf_isblank.sas

@@ -0,0 +1,26 @@
+/**
+  @file mf_isblank.sas
+  @brief Checks whether a macro variable is empty (blank)
+  @details Simply performs:
+
+      %sysevalf(%superq(param)=,boolean)
+
+  Usage:
+     
+     %put mf_isblank(&var);
+
+  inspiration:  https://support.sas.com/resources/papers/proceedings09/022-2009.pdf
+
+  @param param VALUE to be checked 
+
+  @return output returns 1 (if blank) else 0
+
+  @version 9.2
+**/
+
+%macro mf_isblank(param
+)/*/STORE SOURCE*/;
+
+  %sysevalf(%superq(param)=,boolean)
+
+%mend;