AppCode: custom Source Trees

platform/util/src/com/intellij/openapi/util/Pair.java

@@ -23,6 +23,28 @@ public class Pair<A, B> {
   public final A first;
   public final B second;
 
+
+  public static <A, B> Pair<A, B> create(A first, B second) {
+    return new Pair<A, B>(first, second);
+  }
+
+  @SuppressWarnings({"UnusedDeclaration"})
+  public static <A, B> Function<A, Pair<A, B>> createFunction(@Nullable final B value) {
+    return new Function<A, Pair<A, B>>() {
+      public Pair<A, B> fun(A a) {
+        return create(a, value);
+      }
+    };
+  }
+
+  public static <T> T getFirst(@Nullable Pair<T, ?> pair) {
+    return pair != null ? pair.first : null;
+  }
+
+  public static <T> T getSecond(@Nullable Pair<?, T> pair) {
+    return pair != null ? pair.second : null;
+  }
+
   public Pair(A first, B second) {
     this.first = first;
     this.second = second;
@@ -36,19 +58,6 @@ public class Pair<A, B> {
     return second;
   }
 
-  public static <A, B> Pair<A, B> create(A first, B second) {
-    return new Pair<A,B>(first, second);
-  }
-
-  @SuppressWarnings({"UnusedDeclaration"})
-  public static <A, B> Function<A, Pair<A, B>> createFunction(@Nullable final B value) {
-    return new Function<A, Pair<A, B>>() {
-      public Pair<A, B> fun(A a) {
-        return create(a, value);
-      }
-    };
-  }
-
   public final boolean equals(Object o) {
     return o instanceof Pair && Comparing.equal(first, ((Pair)o).first) && Comparing.equal(second, ((Pair)o).second);
   }