src/java.base/share/classes/java/lang/invoke/MemberName.java

@@ -450,10 +450,11 @@
     static final int BRIDGE     = 0x00000040;
     static final int VARARGS    = 0x00000080;
     static final int SYNTHETIC  = 0x00001000;
     static final int ANNOTATION = 0x00002000;
     static final int ENUM       = 0x00004000;
+    static final int FLATTENABLE = 0x00000100;
     static final int FLATTENED  = 0x00008000;
 
     /** Utility method to query the modifier flags of this member; returns false if the member is not a method. */
     public boolean isBridge() {
         return testAllFlags(IS_METHOD | BRIDGE);

@@ -465,14 +466,18 @@
     /** Utility method to query the modifier flags of this member; returns false if the member is not a method. */
     public boolean isSynthetic() {
         return testAllFlags(SYNTHETIC);
     }
 
-    public boolean isValue() { return clazz.isValue(); }
+    public boolean isFlattenable() { return (flags & FLATTENABLE) == FLATTENABLE; }
 
     public boolean isFlattened() { return (flags & FLATTENED) == FLATTENED; }
 
+    public boolean isNullable()  { return !isFlattenable(); }
+
+    public boolean isValue() { return clazz.isValue(); }
+
     static final String CONSTRUCTOR_NAME = "<init>";  // the ever-popular
 
     // modifiers exported by the JVM:
     static final int RECOGNIZED_MODIFIERS = 0xFFFF;