## Boolean setting.data.keep.leaf

### Overview[ depends on jquery.ztree.core js ]

The leaf node's lock, the leaf node will lock the 'isParent' attribute to false.

Default: false

### Boolean Format

true means: lock the leaf node, and the node which 'isParent' attribute is false can't add child nodes.

false means: don't lock the leaf node, and the node which 'isParent' attribute is false can add child nodes.

### Examples of setting

#### 1. lock the leaf node

    var setting = {
    	data: {
    		keep: {
    			leaf: true
    		}
    	}
    };
    ......