Closureを受けた変数名を取ってくる / retrieve a variable name for Closure object

closure_name.groovy

def closure = {
    println 'Hoge'
}

class BokuUsamimi {
    def kaworichan = {
        println "I love you!"
    }
}

void hoge (Closure closure) {
    def map = closure.delegate.properties.collectEntries {
        [it.value, it.key]
    }
    def name = map[closure]
    print "${name}, "
    closure.call()
}

hoge new BokuUsamimi().kaworichan

UsaMimi.groovy

class UsaMimi {
    def kaworiChan = {println 'I love you!'}
    def kyon = {Closure closure ->
        def map = closure.delegate.properties.collectEntries {
            [it.value, it.key]
        }
        def name = map[closure]
        print "${name} "
        closure ()
    }
    void api () {
        kyon (kaworiChan)
    }
}

def usa = new UsaMimi ()
usa.api ()

UsaMimiGroovy.log

groovy> class UsaMimi { 
groovy>     def kaworiChan = {println 'I love you!'} 
groovy>     def kyon = {Closure closure -> 
groovy>         def map = closure.delegate.properties.collectEntries { 
groovy>             [it.value, it.key] 
groovy>         } 
groovy>         def name = map[closure] 
groovy>         print "${name} " 
groovy>         closure () 
groovy>     } 
groovy>     void api () { 
groovy>         kyon (kaworiChan) 
groovy>     } 
groovy> } 
groovy> def usa = new UsaMimi () 
groovy> usa.api () 
 
kaworiChan I love you!

UsanoMimi.groovy

class BokuUsamimi {

    def kaworiChan = {
        println "I love you!"
    }

    void mimi (Closure closure) {
        def map = closure.delegate.properties.collectEntries {
            [it.value, it.key]
        }
        def name = map[closure]
        print "${name} "
        closure ()
    }
}

def usaNo = new BokuUsamimi ()
usaNo.mimi usaNo.kaworiChan