Inserts a new row at position before specified row in TreeGrid directive.
|name||String||The value of name attribute of the TreeGrid directive|
|row||Object||The row to add to the tree collection|
|refRow||Object||A reference row before which the newly added row will be positioned|
This method does not return a value.
This method is part of IntegralUITreeGridService.
Supported in: v1.0.