code: private function createProcessForSource($source)
      {
          if (null === $this->temporaryFile) {
              $this->temporaryFile = tempnam('.', 'cs_fixer_tmp_');
              $this->fileRemoval->observe($this->temporaryFile);
          }
  
          if (false === @file_put_contents($this->temporaryFile, $source)) {
              throw new IOException(sprintf('Failed to write file "%s".', $this->temporaryFile), 0, null, $this->temporaryFile);
          }
  
          return $this->createProcessForFile($this->temporaryFile);
      }
docs: Create process that lint PHP code.
  
  @param string $source code
  
  @return Process