How to use the java.util.Collections.SingletonMap function in java

function(){
return(this.b$["java.util.Collections.SingletonMap"].k==null?0:this.b$["java.util.Collections.SingletonMap"].k.hashCode())^(this.b$["java.util.Collections.SingletonMap"].v==null?0:this.b$["java.util.Collections.SingletonMap"].v.hashCode());
});
Clazz.overrideMethod(c$,"setValue",

function(a){
if(Clazz.instanceOf(a,java.util.Map.Entry)){
var b=a;
return this.b$["java.util.Collections.SingletonMap"].containsKey(b.getKey())&&this.b$["java.util.Collections.SingletonMap"].containsValue(b.getValue());
}return false;
},"~O");
Clazz.overrideMethod(c$,"size",

function(){
return(this.b$["java.util.Collections.SingletonMap"].k==null?0:this.b$["java.util.Collections.SingletonMap"].k.hashCode())^(this.b$["java.util.Collections.SingletonMap"].v==null?0:this.b$["java.util.Collections.SingletonMap"].v.hashCode());
});
Clazz.overrideMethod(c$,"setValue",

function(a){
if(Clazz.instanceOf(a,java.util.Map.Entry)){
var b=a;
return this.b$["java.util.Collections.SingletonMap"].containsKey(b.getKey())&&this.b$["java.util.Collections.SingletonMap"].containsValue(b.getValue());
}return false;
},"~O");
Clazz.overrideMethod(c$,"size",

function(){
return(this.b$["java.util.Collections.SingletonMap"].k==null?0:this.b$["java.util.Collections.SingletonMap"].k.hashCode())^(this.b$["java.util.Collections.SingletonMap"].v==null?0:this.b$["java.util.Collections.SingletonMap"].v.hashCode());
});
Clazz.overrideMethod(c$,"setValue",

function(){
return this.b$["java.util.Collections.SingletonMap"].v;
});
Clazz.overrideMethod(c$,"hashCode",

function(){
return this.b$["java.util.Collections.SingletonMap"].k;
});
Clazz.overrideMethod(c$,"getValue",

function(){
return(this.b$["java.util.Collections.SingletonMap"].k==null?0:this.b$["java.util.Collections.SingletonMap"].k.hashCode())^(this.b$["java.util.Collections.SingletonMap"].v==null?0:this.b$["java.util.Collections.SingletonMap"].v.hashCode());
});
$_V(c$,"setValue",

function(a){
if($_O(a,java.util.Map.Entry)){
var b=a;
return this.b$["java.util.Collections.SingletonMap"].containsKey(b.getKey())&&this.b$["java.util.Collections.SingletonMap"].containsValue(b.getValue());
}return false;
},"~O");
$_V(c$,"size",