Using recursion, complete the body of the following static method. [JAVA]

/**

* Refactors the given {@code Statement} by renaming every occurrence of

* instruction {@code oldName} to {@code newName}. Every other statement is

* left unmodified.

*

* @param s

*            the {@code Statement}

* @param oldName

*            the name of the instruction to be renamed

* @param newName

*            the new name of the renamed instruction

* @updates s

* @requires [newName is a valid IDENTIFIER]

* @ensures

* s = [#s refactored so that every occurrence of instruction oldName

*   is replaced by newName]

*

*/

public static void renameInstruction(Statement s, String oldName,

        String newName) {…}

Using the method above, complete the body of the following static method.

/**

* Refactors the given {@code Program} by renaming instruction

* {@code oldName}, and every call to it, to {@code newName}. Everything

* else is left unmodified.

*

* @param p

*            the {@code Program}

* @param oldName

*            the name of the instruction to be renamed

* @param newName

*            the new name of the renamed instruction

* @updates p

* @requires

* oldName is in DOMAIN(p.context) and

* [newName is a valid IDENTIFIER] and

* newName is not in DOMAIN(p.context)

*

* @ensures

* p = [#p refactored so that instruction oldName and every call

*   to it are replaced by newName]

*

*/

public static void renameInstruction(Program p, String oldName,

        String newName) {…}

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