code: public function getDumpableDefinition($identifier)
      {
          if (isset($this->dumpableDefinitions[$identifier])) {
              return $this->dumpableDefinitions[$identifier];
          } elseif (isset($this->definitions[$identifier])) {
              return $this->converter->convert($identifier, $this->definitions[$identifier]);
          } else {
              throw new CompilerException(sprintf('Unknown identifier in compiler: "%s"', $identifier));
          }
      }
docs: Returns the dumpable definition matching the $identifier.
  
  @param string $identifier
  
  @return Definition\AliasDefinition|DumpableInterface|Definition\FactoryCallDefinition|Definition\ObjectDefinition|Definition\ParameterDefinition
  
  @throws CompilerException