If one of these options is specified then slave will be inserted at the specified point. If the slave are already managed by the geometry manager then any unspecified options for them retain their previous values rather than receiving default values. Removes slave from the packing order for its master and unmaps its window. The slave will no longer be managed by the packer. In either of these cases an empty string is returned.
Propagation is enabled by default.
The order of the slaves in the list is the same as their order in the packing order. For each master the packer maintains an ordered list of slaves called the packing list . If none of these options is given for a slave then the slave is added to the end of the packing list for its parent. The packer arranges the slaves for a master by scanning the packing list in order. At the time it processes each slave, a rectangular area within the master is still unallocated.