private void createAddressRemap() {
		remapAddressByAddress = new HashMap<>();

		// Put in two basic entries so we do not have to do conditional tests before looking
		// up values in the table.
		remapAddressByAddress.put(BAD_ADDRESS, BAD_ADDRESS);
		remapAddressByAddress.put(ZERO_ADDRESS, ZERO_ADDRESS);
		remapAddressByAddress.put(EXTERNAL_ADDRESS, EXTERNAL_ADDRESS);
	}
Returns the address for the symbol name.  If the symbol name did not exist within the
program when the list was being populated or if the name was seen at more than one address,
then null is returned
@param name the name of the symbol
@return the address for that name or null
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/PdbAddressManager.java