     }
     
     
-    // MARK: SafeRowImpl
+    // MARK: - SafeRowImpl
     
     /// See Row.init(statement:unsafe:)
     private struct SafeRowImpl : RowImpl {

        }
    }
    
    /// Helper method for tests.
    subscript(index: Int) -> SQLiteValue {
        return impl.sqliteValue(atIndex: index)
    }
    
    
    // MARK: DictionaryRowImpl
    
    /// See Row.init(sqliteDictionary:)
    private struct DictionaryRowImpl : RowImpl {

    
    - parameter sqliteDictionary: A dictionary of SQLiteValue.
    */
    init(sqliteDictionary: [String: SQLiteValue]) {
        // IMPLEMENTATION NODE
        //
        // This initializer is used by RowModel.insert() so that it can call
