The signature help provider interface defines the contract between extensions and the parameter hints-feature.
The signature help provider interface defines the contract between extensions and the [parameter hints](https://code.visualstudio.com/docs/editor/intellisense)-feature.
(provide-signature-help signature-help-provider document position token context)Provide help for the signature at the given position and document.
Parameters:
document: TextDocument - The document in which the command was invoked.position: Position - The position at which the command was invoked.token: CancellationToken - A cancellation token.context: SignatureHelpContext - Information about how signature help was triggered.Returns: ProviderResult<SignatureHelp> - Signature help or a thenable that resolves to such. The lack of a result can be
signaled by returning undefined or null.
Provide help for the signature at the given position and document. **Parameters:** - `document`: `TextDocument` - The document in which the command was invoked. - `position`: `Position` - The position at which the command was invoked. - `token`: `CancellationToken` - A cancellation token. - `context`: `SignatureHelpContext` - Information about how signature help was triggered. **Returns:** `ProviderResult<SignatureHelp>` - Signature help or a thenable that resolves to such. The lack of a result can be signaled by returning `undefined` or `null`.
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