Function ruby_optimizer_step 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn ruby_optimizer_step(
    optimizer: *mut TorshOptimizer,
    _parameters: *mut *mut TorshTensor,
    _gradients: *mut *mut TorshTensor,
    _param_count: usize,
) -> TorshError

Ruby-specific wrapper for optimizer step