Put association description before warning

Warning came too early, before the explanation of what an association source was.

Author: MarkvanMents

content/en/docs/refguide/modeling/pages/data-widgets/data-sources/association-source.md

@@ -8,12 +8,12 @@ weight: 60
 
 The **Association** source is a data source available to nested [data grids](/refguide/data-grid/), [template grids](/refguide/template-grid/), and [list views](/refguide/list-view/). 
 
+An **Association** data source fills the widget with objects linked to another object by an association. To provide the context, the data container needs to be nested within another data container.
+
 {{% alert color="warning" %}}
 If objects are already in memory, the **Association** source retrieves them from memory, not from the database. 
 {{% /alert %}}
 
-An **Association** data source fills the widget with objects linked to another object by an association. To provide the context, the data container needs to be nested within another data container.
-
 Data containers that can have other data containers inside them are the [template grid](/refguide/template-grid/), [list view](/refguide/list-view/), and [data view](/refguide/data-view/).
 
 {{% alert color="warning" %}}