public function defineInlineOperator(string $operator, callable $transformer)
    {
        unset($this->operators[$operator]);
        $this->inlineOperators[$operator] = $transformer;
    }
public function defineInlineOperator(string $operator, callable $transformer)
    {
        unset($this->operators[$operator]);
        $this->inlineOperators[$operator] = $transformer;
    }
public function defineInlineOperator ( string $ operator , callable $ transformer ) { unset ( $ this -> operators [ $ operator ] ) ; $ this -> inlineOperators [ $ operator ] = $ transformer ; }
Set an inline-able operator.

@param string   $operator    The operator's name.
@param callable $transformer Callable.
Set an inline - able operator .