@blockchaincommons/envelope-pattern - v1.0.0-beta.2
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    Type Alias TokenKind

    TokenKind:
        | "And"
        | "Or"
        | "Not"
        | "Traverse"
        | "RepeatZeroOrMore"
        | "RepeatZeroOrMoreLazy"
        | "RepeatZeroOrMorePossessive"
        | "RepeatOneOrMore"
        | "RepeatOneOrMoreLazy"
        | "RepeatOneOrMorePossessive"
        | "RepeatZeroOrOne"
        | "RepeatZeroOrOneLazy"
        | "RepeatZeroOrOnePossessive"
        | "Assertion"
        | "AssertionPred"
        | "AssertionObj"
        | "Digest"
        | "Node"
        | "Obj"
        | "Obscured"
        | "Elided"
        | "Encrypted"
        | "Compressed"
        | "Pred"
        | "Subject"
        | "Wrapped"
        | "Unwrap"
        | "Search"
        | "ByteString"
        | "Leaf"
        | "Cbor"
        | "DateKeyword"
        | "Known"
        | "Null"
        | "NumberKeyword"
        | "Tagged"
        | "BoolKeyword"
        | "BoolTrue"
        | "BoolFalse"
        | "TextKeyword"
        | "NaN"
        | "StringLiteral"
        | "ParenOpen"
        | "ParenClose"
        | "BracketOpen"
        | "BracketClose"
        | "Comma"
        | "Ellipsis"
        | "GreaterThanOrEqual"
        | "LessThanOrEqual"
        | "GreaterThan"
        | "LessThan"
        | "Integer"
        | "Float"
        | "Infinity"
        | "NegativeInfinity"
        | "GroupName"
        | "Regex"
        | "HexPattern"
        | "HexBinaryRegex"
        | "DatePattern"
        | "Range"
        | "SingleQuotedPattern"
        | "SingleQuotedRegex"

    The kind of a token, as UnexpectedToken reports it.