Function ecs_field_is_writeonly 

pub unsafe extern "C" fn ecs_field_is_writeonly(
    it: *const ecs_iter_t,
    index: i32,
) -> bool

Test whether the field is writeonly. This operation returns whether this is a writeonly field. Writeonly terms are annotated with [out].

Serializers are not required to serialize the values of a writeonly field.

@param it The iterator. @param index The index of the field in the iterator. @return Whether the field is writeonly.