insert_before
Description:
Inserts a new row before sibling.
If sibling is null, then the row will be appended to parent ’s children. If
parent and sibling are null, then the row will be appended to the toplevel. If both
sibling and parent are set, then parent must be the parent of sibling. When sibling
is set, parent is optional.
iter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to
call @set or
set_value.
Parameters:
| this | |
| iter |
An unset TreeIter to set to the new row |
| parent |
A valid TreeIter, or null |
| sibling |
A valid TreeIter, or null |