package org.slf4j.event;

public class KeyValuePair {

    public final String key;
    public final Object value;

    public KeyValuePair(String key, Object value) {
        this.key = key;
        this.value = value;
    }

}

@@ -220,10 +220,135 @@
 %0A    %7D%0A%0A
+    @Override%0A    public String toString() %7B%0A        return String.valueOf(key) + %22=%5C%22%22 + String.valueOf(value) +%22%5C%22%22;%0A    %7D%0A
 %7D%0A

add toString method in KeyValuePair