assistant.setContentAssistProcessor(processor, ATGPartitions.CHARACTERS_SEGMENT);
processor = new ATGCompletionProcessor(fEditor.getATGModelProvider(), new TokensSegmentProposalProvider());
assistant.setContentAssistProcessor(processor, ATGPartitions.TOKENS_SEGMENT);
processor = new ATGCompletionProcessor(fEditor.getATGModelProvider(), new PragmasSegmentProposalProvider());
assistant.setContentAssistProcessor(processor, ATGPartitions.PRAGMAS_SEGMENT);
processor = new ATGCompletionProcessor(fEditor.getATGModelProvider(), new CommentsSegmentProposalProvider());
assistant.setContentAssistProcessor(processor, ATGPartitions.COMMENTS_SEGMENT);