public Data getData() {
		SymbolEntry entry = entryList[0];
		if (entry instanceof MappedDataEntry) {
			return ((MappedDataEntry) entry).getData();
		}
		return null;
	}
Get the Data object backing this, if it exists
@return the Data object or null
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/HighCodeSymbol.java