void clearAll() throws IOException {
		table.deleteAll();
		viewToOriginalMap = new HashMap<>();
		originalToViewMap = new HashMap<>();
	}
Construct database-backed bidirectional datatype ID map
@param dbHandle database handle for {@link CompositeViewerDataTypeManager}
@param errorHandler error handler
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/IDMapDB.java