initialOrigin method
Compute the desired value of #arrangementOrigin if this Layout is being performed for a Group.
This is typically called near the beginning of the implementation of #doLayout:
this.arrangementOrigin = this.initialOrigin(this.arrangementOrigin);
if the layout wants to respect the pre-layout location of the Group when deciding where to position its member nodes.
Implementation
_i3.Point initialOrigin(_i3.Point origin) => _i4.callMethod(
this,
'initialOrigin',
[origin],
);