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Exclude Position Restriction

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Erroneous Code Example

This error occurs when you place an exclude operation in a position other than the last step of a traversal or the step before an object remapping or closure remapping step. In this example, the exclude step is used before the Out<Knows> step which is not allowed. 
Query getUser(userId: ID) =>
    users <- N<User>(userId)::!{email}::Out<Knows>
    RETURN users