diff --git a/include/lrdatasourcemanagerintf.h b/include/lrdatasourcemanagerintf.h
index a10cb05..040dd1d 100644
--- a/include/lrdatasourcemanagerintf.h
+++ b/include/lrdatasourcemanagerintf.h
@@ -65,6 +65,7 @@ public:
     virtual VariableDataType variableDataType(const QString& name) = 0;
     virtual bool variableIsSystem(const QString& name) = 0;
     virtual IDataSource* dataSource(const QString& name) = 0;
+    virtual IDataSourceHolder* dataSourceHolder(const QString& name) = 0;
 };
 
 }
diff --git a/limereport/lrdatadesignintf.h b/limereport/lrdatadesignintf.h
index 85d7957..06edc3d 100644
--- a/limereport/lrdatadesignintf.h
+++ b/limereport/lrdatadesignintf.h
@@ -46,42 +46,6 @@ namespace LimeReport{
 
 class DataSourceManager;
 
-//class IDataSource {
-//public:
-//    enum DatasourceMode{DESIGN_MODE,RENDER_MODE};
-//    typedef QSharedPointer<IDataSource> Ptr;
-//    virtual ~IDataSource(){}
-//    virtual bool next() = 0;
-//    virtual bool hasNext() = 0;
-//    virtual bool prior() = 0;
-//    virtual void first() = 0;
-//    virtual void last() = 0;
-//    virtual bool bof() = 0;
-//    virtual bool eof() = 0;
-//    virtual QVariant data(const QString& columnName) = 0;
-//    virtual QVariant dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData) = 0;
-//    virtual int columnCount() = 0;
-//    virtual QString columnNameByIndex(int columnIndex) = 0;
-//    virtual int columnIndexByName(QString name) = 0;
-//    virtual bool isInvalid() const = 0;
-//    virtual QString lastError() = 0;
-//    virtual QAbstractItemModel* model() = 0;
-//};
-
-//class IDataSourceHolder {
-//public:
-//    virtual IDataSource* dataSource(IDataSource::DatasourceMode mode = IDataSource::RENDER_MODE) = 0;
-//    virtual QString lastError() const = 0;
-//    virtual bool isInvalid() const = 0;
-//    virtual bool isOwned() const = 0;
-//    virtual bool isEditable() const = 0;
-//    virtual bool isRemovable() const = 0;
-//    virtual void invalidate(IDataSource::DatasourceMode mode, bool dbWillBeClosed = false) = 0;
-//    virtual void update() = 0;
-//    virtual void clearErrors() = 0;
-//    virtual ~IDataSourceHolder(){}
-//};
-
 class ModelHolder: public QObject, public IDataSourceHolder{
     Q_OBJECT
 public:
diff --git a/limereport/lrdatasourcemanagerintf.h b/limereport/lrdatasourcemanagerintf.h
index a10cb05..040dd1d 100644
--- a/limereport/lrdatasourcemanagerintf.h
+++ b/limereport/lrdatasourcemanagerintf.h
@@ -65,6 +65,7 @@ public:
     virtual VariableDataType variableDataType(const QString& name) = 0;
     virtual bool variableIsSystem(const QString& name) = 0;
     virtual IDataSource* dataSource(const QString& name) = 0;
+    virtual IDataSourceHolder* dataSourceHolder(const QString& name) = 0;
 };
 
 }