original_string: protected function getBuiltinFunction($name)
      {
          $libName = 'lib' . preg_replace_callback(
              '/_(.)/',
              function ($m) {
                  return ucfirst($m[1]);
              },
              ucfirst($name)
          );
  
          return [$this, $libName];
      }
code: protected function getBuiltinFunction($name)
      {
          $libName = 'lib' . preg_replace_callback(
              '/_(.)/',
              function ($m) {
                  return ucfirst($m[1]);
              },
              ucfirst($name)
          );
  
          return [$this, $libName];
      }
code_tokens: protected function getBuiltinFunction ( $ name ) { $ libName = 'lib' . preg_replace_callback ( '/_(.)/' , function ( $ m ) { return ucfirst ( $ m [ 1 ] ) ; } , ucfirst ( $ name ) ) ; return [ $ this , $ libName ] ; }
docstring: Get built-in function
  
  @param string $name Normalized name
  
  @return array
docstring_tokens: Get built - in function