Logic for source of data in bind operations.
| addBind | adds one more bound target |
| getBindData | fills the target object with data |
| removeBind | disables data binding |
| saveBatch | makes simultaneous saving of several components |
| setBindData | moves data from master to child |
| onBindUpdate | fires when data is changed in the slave and 'save()' is called to update the master. |