# Objective
Originally [provided as a solution to a user's problem in
Discord](https://discord.com/channels/691052431525675048/1247654592838111302/1344431131277394042),
library authors might find the need to present user-registered systems
with system-specific data. Typically `Local<T>` is used for this type of
thing, but its not generally feasible or possible to configure/set the
underlying `T` data for locals. Alternatively, we can use `SystemInput`
to pass the data.
## Solution
- Added `IntoSystem::with_input`: Allows system-specific data to be
passed in explicitly.
- Added `IntoSystem::with_input_from`: Allows system-specific data to be
created at initialization time via `FromWorld`.
## Testing
Added two new tests, testing each of `with_input` and `with_input_from`.
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