Changed return type back from interface

dbmap.go

@@ -80,7 +80,7 @@ type DbMap struct {
 }
 
 // NewDbMap returns a new DbMap using the db connection and dialect
-func NewDbMap(db *sql.DB, dialect Dialect) *DbIM {
+func NewDbMap(db *sql.DB, dialect Dialect) *DbMap {
 	return &DbMap{Db: db, Dialect: dialect, Dbx: sqlx.NewDb(db, dialect.DriverName())}
 }