xdrgen: XDR width for variable-length array

    maxsize: str

    template: str = "variable_length_array"

    def max_width(self) -> int:

        """Return width of type in XDR_UNITS"""

        return 1 + (xdr_quadlen(self.maxsize) * max_widths[self.spec.type_name])

    def symbolic_width(self) -> List:

        """Return list containing XDR width of type's components"""

        widths = ["XDR_unsigned_int"]

        if self.maxsize != "0":

            item_width = " + ".join(symbolic_widths[self.spec.type_name])

            widths.append("(" + self.maxsize + " * (" + item_width + "))")

        return widths

    def __post_init__(self):

        max_widths[self.name] = self.max_width()

        symbolic_widths[self.name] = self.symbolic_width()

@dataclass

class _XdrOptionalData(_XdrDeclaration):