com.jnape.palatable.lambda.optics.lenses

## Class HMapLens

- java.lang.Object
- - com.jnape.palatable.lambda.optics.lenses.HMapLens

-     public final class HMapLens
      extends Object

  Lenses that operate on `HMap`s.

- - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static <A> Lens.Simple<HMap,Maybe<A>>` | `valueAt(TypeSafeKey<?,A> key)` A lens that focuses on a value at a `TypeSafeKey.Simple`<A> in an `HMap`, as a `Maybe`.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Method Detail

    - #### valueAt

          public static <A> Lens.Simple<HMap,Maybe<A>> valueAt(TypeSafeKey<?,A> key)

      A lens that focuses on a value at a `TypeSafeKey.Simple`<A> in an `HMap`, as a `Maybe`.
      Type Parameters:
        `A` - the value type at the key
      Parameters:
        `key` - the key
      Returns:
        the lens