No more use of $_ to mark private members.

src/FactorGraphs/Message.php

@@ -4,22 +4,22 @@ namespace DNW\Skills\FactorGraphs;
 
 class Message implements \Stringable
 {
-    public function __construct(private $_value = null, private $_name = null)
+    public function __construct(private $value = null, private $name = null)
     {
     }
 
     public function getValue()
     {
-        return $this->_value;
+        return $this->value;
     }
 
     public function setValue($value)
     {
-        $this->_value = $value;
+        $this->value = $value;
     }
 
     public function __toString(): string
     {
-        return (string) $this->_name;
+        return $this->name;
     }
 }