Function get_field_struct_in_struct 

pub unsafe fn get_field_struct_in_struct<'a>(
    st: &Struct<'a>,
    field: &Field<'_>,
) -> FlatbufferResult<Struct<'a>>

Gets a Struct struct field given its exact type. Returns error if the type doesn’t match.

Safety

The value of the corresponding slot must have type Struct.