nested panels, automatic <a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-split" ext:member="split" ext:cls="Ext.layout.BorderLayout.Region">split</a> bars between
<a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-BorderLayout.Region" ext:member="BorderLayout.Region" ext:cls="Ext.layout.BorderLayout.Region">regions</a> and built-in
<a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-collapsible" ext:member="collapsible" ext:cls="Ext.layout.BorderLayout.Region">expanding and collapsing</a> of regions.</p>
nested panels, automatic <a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-split" ext:member="split" ext:cls="Ext.layout.BorderLayout.Region">split</a> bars between
<a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-BorderLayout.Region" ext:member="BorderLayout.Region" ext:cls="Ext.layout.BorderLayout.Region">regions</a> and built-in
<a href="output/Ext.layout.BorderLayout.Region.html#Ext.layout.BorderLayout.Region-collapsible" ext:member="collapsible" ext:cls="Ext.layout.BorderLayout.Region">expanding and collapsing</a> of regions.</p>