original_string: public function readOnly($bool = true){
  		$list = $this->copy(false);
  		$list->setReadOnly();
  		return $list;
  	}
code: public function readOnly($bool = true){
  		$list = $this->copy(false);
  		$list->setReadOnly();
  		return $list;
  	}
code_tokens: public function readOnly ( $ bool = true ) { $ list = $ this -> copy ( false ) ; $ list -> setReadOnly ( ) ; return $ list ; }
docstring: Creates a shallow copy of this list and sets it to read only
  @param bool $bool
  @return \static
docstring_tokens: Creates a shallow copy of this list and sets it to read only