Module one 

Structs

ChangeDetectionFetch

One

WorldQuery adapter that fetches entities with exactly one component implementing a trait.

OneAdded

WorldQuery filter for entities with exactly one component implementing a trait, whose value has changed since the last time the system ran.

OneChanged

WorldQuery filter for entities with exactly one component implementing a trait, which was added since the last time the system ran.

OneTraitFetch

WithOne

WorldQuery filter for entities with exactly one component implementing a trait.

WithoutAny

WorldQuery filter for entities without any one component implementing a trait.