public IncrementalBuilder.Result build( final BuildRequest request, final Function1<? super URI, ? extends IResourceServiceProvider> languages, final IResourceClusteringPolicy clusteringPolicy) { try { final XtextResourceSet resourceSet = request.getResourceSet(); IndexState _state = request.getState(); ResourceDescriptionsData _resourceDescriptions = _state.getResourceDescriptions(); ResourceDescriptionsData _copy = _resourceDescriptions.copy(); IndexState _state_1 = request.getState(); Source2GeneratedMapping _fileMappings = _state_1.getFileMappings(); Source2GeneratedMapping _copy_1 = _fileMappings.copy(); final IndexState oldState = new IndexState(_copy, _copy_1); CancelIndicator _cancelIndicator = request.getCancelIndicator(); final BuildContext context = new BuildContext(languages, resourceSet, oldState, clusteringPolicy, _cancelIndicator); final IncrementalBuilder.InternalStatefulIncrementalBuilder builder = this.provider.get(); builder.context = context; builder.request = request; try { return builder.launch(); } catch (final Throwable _t) { if (_t instanceof Throwable) { final Throwable t = (Throwable) _t; this._operationCanceledManager.propagateIfCancelException(t); throw t; } else { throw Exceptions.sneakyThrow(_t); } } } catch (Throwable _e) { throw Exceptions.sneakyThrow(_e); } }