Change self() to protected in OMR::Method

Signed-off-by: Abhi <abhiasawale510@gmail.com>

compiler/compile/OMRMethod.hpp

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2019 IBM Corp. and others
+ * Copyright (c) 2000, 2021 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -118,8 +118,6 @@ class Method
 
    TR_ALLOC(TR_Memory::Method);
 
-   TR::Method *self();
-
    enum Type {J9, Test, JitBuilder};
 
 
@@ -173,6 +171,10 @@ class Method
    void setRecognizedMethod(TR::RecognizedMethod rm) { _recognizedMethod = rm; }
    void setMandatoryRecognizedMethod(TR::RecognizedMethod rm) { _mandatoryRecognizedMethod = rm; }
 
+   protected:
+
+   TR::Method *self();
+
    private:
 
    TR::RecognizedMethod _recognizedMethod;