MDSAL code generator ignores "uses" in RPC input args

If you generate code for the following yang model using org.opendaylight.yangtools.maven.sal.api.gen.plugin.CodeGeneratorImpl

grouping global-fields {
leaf glob-id

{type uint32;}
}

rpc myRPC {

input {
leaf id {type uint32;}

uses global-fields;
}
output {
leaf success

{type boolean;}

}
}

the myRPCInput interface does not contain getter for "glob-id" field.
I think the code generator cannot handle "uses" statement in RPC input arg.