public void addObject(Object obj, Address startAddr, Address endAddr) {
        long start = addrMap.getKey(startAddr);
        long end = addrMap.getKey(endAddr);
        addRange(obj, start, end);
        coalesceRange(start,end);
    }
Associates the given object with the given range of addresses
@param obj the object to associate
@param startAddr the first address in the range
@param endAddr the last address in the range
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/AddressObjectMap.java