Function duckdb_struct_type_child_type 

pub unsafe extern "C" fn duckdb_struct_type_child_type(
    type_: duckdb_logical_type,
    index: idx_t,
) -> duckdb_logical_type

Retrieves the child type of the given struct type at the specified index.

The result must be freed with duckdb_destroy_logical_type

type: The logical type object index: The child index returns: The child type of the struct type. Must be destroyed with duckdb_destroy_logical_type.