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introduce UnusedLocalMethodCheck (RSPEC-S1144) #16960

@Pankraz76

Description

@Pankraz76

add counterpart to https://checkstyle.sourceforge.io/checks/coding/unusedlocalvariable.html

cat

/*
UnusedLocalMethod

*/
package com.puppycrawl.tools.checkstyle.checks.coding.unusedlocalmethod;

public class InputUnusedLocalMethodChainUnused {
    public InputUnusedLocalMethodChainUnused() {
        used();
    }

    private void used() {
    }

    private void unused2() { // violation, "Unused local method 'unused2'"
    }
}

javac

package com.puppycrawl.tools.checkstyle.checks.coding.unusedlocalmethod;

public class InputUnusedLocalMethodChainUnused {
    public InputUnusedLocalMethodChainUnused() {
        this.used();
    }

    private void used() {
    }

    private void unused2() {
    }
}

config.xml

<module name="UnusedLocalMethod"/>

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