The completion item provider interface defines the contract between extensions and
the IntelliSense.
When computing complete completion items is expensive, providers can optionally implement
the resolveCompletionItem-function. In that case it is enough to return completion
items with a label from the
provideCompletionItems-function. Subsequently,
when a completion item is shown in the UI and gains focus this provider is asked to resolve
the item, like adding doc-comment or details.
The completion item provider interface defines the contract between extensions and the IntelliSense.
When computing complete completion items is expensive, providers can optionally implement the
resolveCompletionItem-function. In that case it is enough to return completion items with a label from the provideCompletionItems-function. Subsequently, when a completion item is shown in the UI and gains focus this provider is asked to resolve the item, like adding doc-comment or details.