if (lookup == null) {
lookup = Lookups.fixed(
LookupProviderSupport.createSourcesMerger(),
new GradleProjectSources(this),
cpProvider,
new GradleSourceLevelQueryImplementation(this),
new GradleUnitTestFinder(this),
new GradleAnnotationProcessingQuery(),
new GradleSourceForBinaryQuery(this),
new GradleBinaryForSourceQuery(this),
new GradleProjectTemplates(),