original_string: protected function _sendContent($content)
      {
          deprecationWarning(
              'Will be removed in 4.0.0'
          );
  
          if (!is_string($content) && is_callable($content)) {
              $content = $content();
          }
  
          echo $content;
      }
code: protected function _sendContent($content)
      {
          deprecationWarning(
              'Will be removed in 4.0.0'
          );
  
          if (!is_string($content) && is_callable($content)) {
              $content = $content();
          }
  
          echo $content;
      }
code_tokens: protected function _sendContent ( $ content ) { deprecationWarning ( 'Will be removed in 4.0.0' ) ; if ( ! is_string ( $ content ) && is_callable ( $ content ) ) { $ content = $ content ( ) ; } echo $ content ; }
docstring: Sends a content string to the client.
  
  If the content is a callable, it is invoked. The callable should either
  return a string or output content directly and have no return value.
  
  @param string|callable $content String to send as response body or callable
  which returns/outputs content.
  @return void
  @deprecated 3.4.0 Will be removed in 4.0.0
docstring_tokens: Sends a content string to the client .