Import declaration anti pattern

Import_Dec_anti_pattern

RPackage:
    'pkg' name=QualifedName
    importDec=ImportDeclaration?;
ImportDec:
    'imports' '{'imports+=Import*'}';
Import:
    importedNamespace=QNWildcard;
    
Problems with the above grammar: 1) You have to overwrite `ImportedNamespaceAwareLocalScopeProvider#internalGetImportedNamespaceResolvers()`, and in that you have to write special handling code to deal with the `ImportDec` (PS code below), 2) In real world projects, you'll see 1000's of models files created, which means equal number of `ImportDec` are created in the memory. It increases the memory requirement, and also increases the work of the garbage collector. 

Is this an antipattern?