place-children in area-container<%>
Called to place the children of a container. See Geometry Management for more information.
(-> list of list containing four exact integers in [0, 10000]sendan-area-containerplace-childreninfowidthheight)
info: list of list containing two exact integers in [0, 10000] and two booleans
width: exact integer in [0, 10000]
height: exact integer in [0, 10000]