@Override
	public DataType toDataType() throws DuplicateNameException, IOException {
		return StructConverterUtil.toDataType( this );
	}
Returns  true if the specified node index is used.
Returns false if the specified node index is free.
@param nodeIndex the node index
@return true if the specified node index is used, false if free
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/ios/btree/BTreeMapRecord.java