private TransferFunction[] getTransferFunctions(){
//
// Copy array to avoid multi-thread conflicts on
// array access.
//
TransferFunction txfFunc[] = new TransferFunction[4];
System.arraycopy(this.txfFunc, 0, txfFunc, 0, 4);
ComponentTransferFunction functions[];
functions = new ComponentTransferFunction[4];
System.arraycopy(this.functions, 0, functions, 0, 4);