Entity/BooleanCharacteristic.php
public function setBoolean($boolean = null)
    {
        $this->boolean = null !== $boolean ? (bool) $boolean : null;

        return $this;
    }
public function setBoolean($boolean = null)
    {
        $this->boolean = null !== $boolean ? (bool) $boolean : null;

        return $this;
    }
public function setBoolean ( $ boolean = null ) { $ this -> boolean = null !== $ boolean ? ( bool ) $ boolean : null ; return $ this ; }
Sets the boolean.

@param boolean $boolean
@return BooleanCharacteristic
Sets the boolean .