void moveLabelHistory(Address oldAddress, Address address) {
		try {
			historyAdapter.moveAddressRange(oldAddress, address, 1, addrMap, TaskMonitor.DUMMY);
		}
		catch (CancelledException e) {
			// can't happen, used dummy monitor
		}
		catch (IOException e) {
			dbError(e);
		}
	}
Checks if the givens symbols from the same address have exactly one primary symbol amongst
them

@param symbols the array of symbols at a an address
@return true if there is exactly one primary symbol at the address (also true if no symbols
        at address)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/SymbolManager.java