protected Address readDefinedDataPointer(Address addr) {
		Data data = program.getListing().getDefinedDataAt(addr);
		if (data == null || !(data.getDataType() instanceof Pointer)) {
			return null;
		}
		return (Address) data.getValue();
	}
Check for a Data pointer at the specified address and return the referenced
address.
@param addr address of stored pointer
@return pointer referenced address or null if no pointer found
Ghidra/Features/Base/src/main/java/ghidra/test/processors/support/PCodeTestAbstractControlBlock.java