package io.jasonsparc.chemistry.util;

import io.jasonsparc.chemistry.IdSelector;
import io.jasonsparc.chemistry.internal.NullChemistry;

/**
 * Created by Jason on 19/08/2016.
 */
@UtilityClass
public final class IdSelectors {

	// Factories

	// Utilities

	public static <Item> IdSelector<Item> empty() {
		return NullChemistry.get();
	}
}

package io.jasonsparc.chemistry.util;

/**
 * Created by Jason on 19/08/2016.
 */
@UtilityClass
public final class IdSelectors {

	// Factories

	// Utilities

}

--- 
+++ 
@@ -1,4 +1,7 @@
 package io.jasonsparc.chemistry.util;
+
+import io.jasonsparc.chemistry.IdSelector;
+import io.jasonsparc.chemistry.internal.NullChemistry;
 
 /**
  * Created by Jason on 19/08/2016.
@@ -10,4 +13,7 @@
 
 	// Utilities
 
+	public static <Item> IdSelector<Item> empty() {
+		return NullChemistry.get();
+	}
 }
Add an empty IdSelector utility
