Function duckdb_uhugeint_to_double 

pub unsafe extern "C" fn duckdb_uhugeint_to_double(
    val: duckdb_uhugeint,
) -> f64

Converts a duckdb_uhugeint object (as obtained from a DUCKDB_TYPE_UHUGEINT column) into a double.

@param val The uhugeint value. @return The converted double element.