original_string: public function getIncrementalErrorOutput()
      {
          $this->readPipesForOutput(__FUNCTION__);
  
          $latest = stream_get_contents($this->stderr, -1, $this->incrementalErrorOutputOffset);
          $this->incrementalErrorOutputOffset = ftell($this->stderr);
  
          if (false === $latest) {
              return '';
          }
  
          return $latest;
      }
code: public function getIncrementalErrorOutput()
      {
          $this->readPipesForOutput(__FUNCTION__);
  
          $latest = stream_get_contents($this->stderr, -1, $this->incrementalErrorOutputOffset);
          $this->incrementalErrorOutputOffset = ftell($this->stderr);
  
          if (false === $latest) {
              return '';
          }
  
          return $latest;
      }
code_tokens: public function getIncrementalErrorOutput ( ) { $ this -> readPipesForOutput ( __FUNCTION__ ) ; $ latest = stream_get_contents ( $ this -> stderr , - 1 , $ this -> incrementalErrorOutputOffset ) ; $ this -> incrementalErrorOutputOffset = ftell ( $ this -> stderr ) ; if ( false === $ latest ) { return '' ; } return $ latest ; }
docstring: Returns the errorOutput incrementally.
  
  In comparison with the getErrorOutput method which always return the
  whole error output, this one returns the new error output since the last
  call.
  
  @return string The process error output since the last call
  
  @throws LogicException in case the output has been disabled
  @throws LogicException In case the process is not started
docstring_tokens: Returns the errorOutput incrementally .