Function duckdb_list_vector_set_size 

pub unsafe extern "C" fn duckdb_list_vector_set_size(
    vector: duckdb_vector,
    size: idx_t,
) -> duckdb_state

Sets the size of the underlying child-vector of a list vector. Note that this does NOT reserve the memory in the child buffer, and that it is possible to set a size exceeding the capacity. To set the capacity, use duckdb_list_vector_reserve.

@param vector The list vector. @param size The size of the child list. @return The duckdb state. Returns DuckDBError, if the vector is nullptr.