public Register getRegister() {
		return register;
	}
Construct from an XML {@code <set>} tag.  The tag is a child of either {@code <context_set>}
or {@code <tracked_set>} which provides details of the memory range affected.
@param el is the XML tag
@param cspec is used to lookup register names present in the tag
@param isContextReg is true for a {@code <context_set>} parent, false for a {@code <tracked_set>} parent
@param first is the first Address in the affected memory range
@param last is the last Address in the affected memory range
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/ContextSetting.java