"A type capable of representing the values [[true]] and
 [[false]] of Boolean logic."​
​by ("Gavin")
​tagged("Basic types")
​shared native abstract class Boolean​
        of true | false {
    
    "The `Boolean` value of the given string representation 
     of a boolean value, or `null` if the string does not 
     represent a boolean value.
     
     Recognized string representations are the strings
     `\"true\"` and `\"false\"`."​
    tagged("Basic types")
    since("1.3.1")
    shared static Boolean|ParseException parse(String string)
            => parseBoolean(string) 
            else ParseException("illegal format for Boolean");
    
    shared new () {}
}
​
"A value representing truth in Boolean logic."​
​tagged("Basic types")
​shared native object true​
        extends Boolean() {
    string => "true";
    hash => 1231;
}
​
"A value representing falsity in Boolean logic."​
​tagged("Basic types")
​shared native object false​
        extends Boolean() {
    string => "false";
    hash => 1237;
}
​