Creates a new signature information object.
A label string.
A doc string.
The index of the active parameter.
If provided, this is used in place of SignatureHelp.activeParameter.
The human-readable doc-comment of this signature. Will be shown in the UI but can be omitted.
The label of this signature. Will be shown in the UI.
The parameters of this signature.
Represents the signature of something callable. A signature can have a label, like a function-name, a doc-comment, and a set of parameters.