void setParent(Register parent) {
		this.parent = parent;
		updateBaseRegisterInfo();
		for (Register child : childRegisters) {
			child.updateBaseRegisterInfo();
		}
	}
Returns list of children registers sorted by lest-significant bit-offset within this
register.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/Register.java