The mouse hover will show many useful information, such as types of symbols, function definition, type information and document.
Press F1 will lead you to MongoDB online document as the cursor is over a valid MongoDB method. The F1 online help is MongoDB version sensitive, e.g. if you connected to MongoDB 2.6, it will lead you to MongoDB 2.6 online document, you will get MongoDB 3.2 online document if you connected to MongoDB 3.2.
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