Function get_field_struct 

pub unsafe fn get_field_struct<'a>(
    table: &Table<'a>,
    field: &Field<'_>,
) -> FlatbufferResult<Option<Struct<'a>>>

Gets a Struct table field given its exact type. Returns None if the field is not set. Returns error if the type doesn’t match.

Safety

The value of the corresponding slot must have type Struct