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final boolean comments) { if (fProjectionModelUpdater instanceof IErlangFoldingStructureProviderExtension) { final IErlangFoldingStructureProviderExtension ext = (IErlangFoldingStructureProviderExtension) fProjectionModelUpdater; if (collapse) { if (comments) { ext.collapseComments(); } else { ext.collapseFunctions(); } } else { ext.expandAll();