EnclosingSignature returns the signature of the innermost function enclosing the syntax node denoted by path (see [astutil.PathEnclosingInterval]), or nil if the node is not within a function.

FormatTypeParams turns TypeParamList into its Go representation, such as: [T, Y].

TypesFromContext returns the type (or perhaps zero or multiple types) of the "hole" into which the expression identified by path must fit.