original_string: public static function fromString($headerString)
      {
          $headerString = trim($headerString);
          list($name, $value) = explode(': ', trim($headerString), 2);
          return new self($name, $value);
      }
code: public static function fromString($headerString)
      {
          $headerString = trim($headerString);
          list($name, $value) = explode(': ', trim($headerString), 2);
          return new self($name, $value);
      }
code_tokens: public static function fromString ( $ headerString ) { $ headerString = trim ( $ headerString ) ; list ( $ name , $ value ) = explode ( ': ' , trim ( $ headerString ) , 2 ) ; return new self ( $ name , $ value ) ; }
docstring: Creates a header from a string representing a single header.
  @param string $headerString
  @return
docstring_tokens: Creates a header from a string representing a single header .