add TokenValidatable interface

Author: Ndiritu

src/main/java/com/microsoft/graph/core/models/TokenValidatable.java

@@ -0,0 +1,34 @@
+package com.microsoft.graph.core.models;
+
+import java.util.List;
+
+/**
+ * TokenValidatable interface
+ */
+public interface TokenValidatable<U extends DecryptableContent, T extends EncryptedContentBearer<U>> {
+
+    /**
+     * Sets collection of validation tokens
+     * @param validationTokens tokens
+     */
+    public void setValidationTokens(List<String> validationTokens);
+
+    /**
+     * Returns validation tokens
+     * @return list of tokens
+     */
+    public List<String> getValidationTokens();
+
+    /**
+     * Sets collection of encrypted token bearers
+     * @param value collection of encrypted token bearers
+     */
+    public void setValue(List<T> value);
+
+    /**
+     * Get collection of encrypted token bearers
+     * @return encrypted token bearers
+     */
+    public List<T> getValue();
+
+}