Function make

repos/effect/packages/effect/src/MutableHashSet.ts:223–225

(
  ...keys: Keys
)

/**
 * Adds a value to the MutableHashSet, mutating the set in place.
 * If the value already exists, the set remains unchanged.
 *
 * **When to use**
 *
 * Use to insert a value into a mutable set while keeping uniqueness.