public class TestMergedCollection1 extends DynamicDataSourceCollection{
public TestMergedCollection1(){
for(int i=0;i<2;i++){
createDataSource(new DataInfo("source " + i), ValueProvider.DoubleProvider);
// Wrap a buffer around it so we see past values too
try {
bufferize(i, new DelayedBuffer(ValueProvider.DoubleProvider, 100));
} catch (UnsupportedOperation e) {