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#### 4.4.3 Object Method Completion in the Shell

In the IDLWAVE Shell (see The IDLWAVE Shell), objects on which methods are being invoked have a special property: they must exist as variables, and so their class can be determined (for instance, using the `obj_class()` function). In the Shell, when attempting completion, routine info, or online help within a method routine, a query is sent to determine the class of the object. If this query is successful, the class found will be used to select appropriate completions, routine info, or help. If unsuccessful, information from all known classes will be used (as in the buffer).