public Data getDataContaining(Address addr) {
		CodeUnit cu = getCodeUnitContaining(addr);
		if (cu instanceof Data) {
			return (Data) cu;
		}
		return null;
	}
Returns the data whose min address is less than or equal to the specified address and whose 
max address is greater than or equal to the specified address.
<pre>{@literal
data.minAddress() <= addr <= data.maxAddress()
}</pre>

@param addr the address to be contained
@return the data containing the specified address, or null if a data does not exist that 
starts at that address.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeManager.java