--- old/src/java.base/share/classes/java/lang/StackWalker.java	2017-08-31 22:38:24.000000000 -0700
+++ new/src/java.base/share/classes/java/lang/StackWalker.java	2017-08-31 22:38:23.000000000 -0700
@@ -26,10 +26,12 @@
 
 import jdk.internal.reflect.CallerSensitive;
 
-import java.util.*;
+import java.lang.invoke.MethodType;
+import java.util.EnumSet;
+import java.util.Objects;
+import java.util.Set;
 import java.util.function.Consumer;
 import java.util.function.Function;
-import java.util.function.Predicate;
 import java.util.stream.Stream;
 
 /**
@@ -128,6 +130,38 @@
         public Class<?> getDeclaringClass();
 
         /**
+         * Returns {@link MethodType} representing the parameter types and
+         * the return type for the method represented by this stack frame.
+         *
+         * @return the {@code MethodType} for this stack frame
+         *
+         * @throws UnsupportedOperationException if this {@code StackWalker}
+         *         is not configured with {@link Option#RETAIN_CLASS_REFERENCE
+         *         Option.RETAIN_CLASS_REFERENCE}.
+         *
+         * @since 10
+         */
+        public MethodType getMethodType();
+
+        /**
+         * Returns the <i>descriptor</i> of the method type for
+         * this stack frame.  A method descriptor is a string representing the
+         * types of parameters that the method takes, and a return descriptor,
+         * representing the type of the value (if any) that the method returns
+         * as defined by <cite>The Java&trade; Virtual Machine Specification</cite>.
+         *
+         * @return the descriptor of the method type represented by
+         *         this stack frame
+         *
+         * @see java.lang.invoke.MethodType#fromMethodDescriptorString(String, ClassLoader)
+         * @jvms 4.3.3 Method Descriptor
+         *
+         * @since 10
+         */
+        public String getDescriptor();
+
+
+        /**
          * Returns the index to the code array of the {@code Code} attribute
          * containing the execution point represented by this stack frame.
          * The code array gives the actual bytes of Java Virtual Machine code