ExtJS Get parent-child, sibling container element method

1. Parent object of the current object (parent object)
THIS.OWNERCT:

2. Next adjacent object of the current object
This.nextsibling ();

3. Previous adjacent object of the current object
This.previoussibling ();

4. The first child object in the current container
This.get (0);
This.items.first ();

5. The last sub-object of the current container
This.items.last ();

6. Find all the ancestor matching containers for the current object
This.findparentbytype (String xtype)

7. Find all subordinate matching components of the current object

This.findbytype (String xtype)

ExtJS Get parent-child, sibling container element method