Function loadBuiltin

test/babel.js:118–129

* Loads the given name (or [name, options] pair) from the given table object * holding the available presets or plugins. * * Returns undefined if the preset or plugin is not available; passes through * name unmodified if it (or the first element of the pair) is not a string.

(builtinTable, name)

	 * name unmodified if it (or the first element of the pair) is not a string.
	 */
	function loadBuiltin(builtinTable, name) {
	  if (isArray(name) && typeof name[0] === 'string') {
	    if (builtinTable.hasOwnProperty(name[0])) {
	      return [builtinTable[name[0]]].concat(name.slice(1));
	    }
	    return;
	  } else if (typeof name === 'string') {
	    return builtinTable[name];
	  }
	  // Could be an actual preset/plugin module
	  return name;
	}

	/**
	 * Parses plugin names and presets from the specified options.