Get the actual return type

[MIchaelMainer]

Providing the actual return type versus implicitly typing the variable would provide more value.

There are business rules for determining the return type. For example, for collections, it is I*CollectionPage, where * is the return type in the collection with an optional name of the OData action. IMailFolderDeltaCollectionPage is an example of this.

Originally posted by @andrueastman in https://github.com/microsoftgraph/microsoft-graph-explorer-api/pull/41#issuecomment-492126468 AB#7030

[darrelmiller]

I would agree when we are not explicitly doing a new Type().