fn parse_anchor_function_fallback<'i, 't>(
context: &ParserContext<'_>,
additional_functions: AdditionalFunctions,
input: &mut Parser<'i, 't>,
) -> Result<Box<GenericAnchorFunctionFallback<Leaf>>, ParseError<'i>>fn parse_anchor_function_fallback<'i, 't>(
context: &ParserContext<'_>,
additional_functions: AdditionalFunctions,
input: &mut Parser<'i, 't>,
) -> Result<Box<GenericAnchorFunctionFallback<Leaf>>, ParseError<'i>>