The type hierarchy params is an extension of the TextDocumentPositionParams with optional properties which can be used to eagerly resolve the item when requesting from the server.
TextDocumentPositionParams
Optional
The direction of the hierarchy levels to resolve.
The hierarchy levels to resolve. 0 indicates no level. When not defined, it is treated as 0.
0
The type hierarchy params is an extension of the
TextDocumentPositionParamswith optional properties which can be used to eagerly resolve the item when requesting from the server.