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1. headStyle :: forall n f . Functor f => (Style V2 n -> f (Style V2 n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD.Arrow

   Style to apply to the head. headStyle is modified by using the lens combinator %~ to change the current style. For example, to change an opaque black arrowhead to translucent orange: (with & headStyle %~ fc orange . opacity 0.75).

2. headTexture :: TypeableFloat n => Lens' (ArrowOpts n) (Texture n)

   diagrams-lib	Diagrams.TwoD.Arrow

   A lens for setting or modifying the texture of an arrowhead. For example, one may write ... (with & headTexture .~ grad) to get an arrow with a head filled with a gradient, assuming grad has been defined. Or ... (with & headTexture .~ solid blue to set the head color to blue. For more general control over the style of arrowheads, see headStyle.

3. head1 :: Foldable1 f => f a -> a

   relude	Relude.Extra.Foldable1

   The first element of a non-empty data structure.

   >>> head1 (1 :| [2, 3, 4])
   1
   

4. header :: Int -> Inlines -> Blocks

   pandoc-types	Text.Pandoc.Builder

   No documentation available.

5. headerWith :: Attr -> Int -> Inlines -> Blocks

   pandoc-types	Text.Pandoc.Builder

   No documentation available.

6. head_ :: Monad m => Stream (Of a) m r -> m (Maybe a)

   streaming	Streaming.Prelude

   No documentation available.

7. headWith :: Options -> String -> IO (Response ())

   wreq	Network.Wreq

   Issue a HEAD request, using the supplied Options. Example:

   let opts = defaults & param "foo" .~ ["bar"]
   headWith opts "http://httpbin.org/get"
   
   

   >>> let opts = defaults & param "foo" .~ ["bar"]
   
   >>> r <- headWith opts "http://httpbin.org/get"
   
   >>> r ^? responseHeader "Connection"
   Just "keep-alive"
   

8. head_ :: String -> IO (Response ())

   wreq	Network.Wreq

   Issue a HEAD request. Example:

   head_ "http://httpbin.org/get"
   
   

   >>> r <- head_ "http://httpbin.org/get"
   
   >>> r ^? responseHeader "Content-Type"
   Just "application/json"
   

9. header :: HeaderName -> Lens' Options [ByteString]

   wreq	Network.Wreq

   A lens onto all headers with the given name (there can legitimately be zero or more). Example:

   let opts = defaults & header "Accept" .~ ["*/*"]
   getWith opts "http://httpbin.org/get"
   
   

10. headers :: Lens' Options [Header]

    wreq	Network.Wreq

    A lens onto all headers (there can legitimately be zero or more). In this example, we print all the headers sent by default with every request.

    print (defaults ^. headers)
    
    

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