Description of alter_mle_env

ALTER MLE ENV [ IF EXISTS ] [schema .] name
  ( ADD IMPORTS ( (import_name MODULE [schema .] mle_module_name)[, import_name MODULE [schema .] mle_module_name ]... )
   | DROP IMPORTS ( (import_name)[,import_name ]... )
   | ALTER IMPORTS ( (import_name MODULE [schema .] mle_module_name)[, import_name MODULE [schema .] mle_module_name]...)
   | SET LANGUAGE OPTIONS option_string
   | COMPILE 
   )