OverloadMethodDeclarationOrder check ignores anything besides methods

[Zopsss]

I have read check documentation: https://checkstyle.org/checks/coding/overloadmethodsdeclarationorder.html
I have downloaded the latest checkstyle from: https://checkstyle.org/cmdline.html#Download_and_Run
I have executed the cli and showed it below, as cli describes the problem better than 1,000 words

The OverloadMethodDeclarationOrderCheck gives us error if there is another method between the overloaded methods. But it does not gives error when there is anything else besides method between overloaded methods like a variable, array, inner interface, inner class, etc.

This is how the check works currently:

Test.java

public class Test {
    void test() {}

    void test(int x) {}

    private interface Testing {}

    String str;

    void test(String str) {}
}

config.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">

<module name="Checker">
    <module name="TreeWalker">
        <module name="OverloadMethodsDeclarationOrder"/>
    </module>
</module>

Output

➜ java -jar ../checkstyle-10.15.0-all.jar -c config.xml Test.java
Starting audit...
Audit done.

The check should be giving error for the last method

void test(String str) {}

---

Describe what you expect in detail.

The check should be give an error something like this for the above example:

➜ java -jar ../checkstyle-10.15.0-all.jar -c config.xml Test.java
Starting audit...
[ERROR] C:\checkstyle testing\OverloadMethods\Test.java:10:5: 
All overloaded methods should be placed next to each other. Placing non-overloaded methods
 in between overloaded methods with the same type is a violation. 
Previous overloaded method located at line '4'. [OverloadMethodsDeclarationOrder]
Audit done.
Checkstyle ends with 1 errors.

---

[Zopsss]

I'm working on it!

[nrmancuso]

Closed via #14766