public Data getUndefinedAt(Address address) {
		return getUndefinedAt(address, addrMap.getKey(address, false));
	}
Returns the undefined data whose min address equals the specified address.

@param address the min address of the undefined data to return 
@return Data the undefined data at the address, null if undefined data does not exist
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeManager.java