class Primer::Beta::Avatar

[Learn more about best image practices (WAI Images)](www.w3.org/WAI/tutorials/images/)
rather than ‘@kittenuser`.
if `Avatar` is a link to a user profile, the alt attribute should be `@kittenuser profile`
If the avatar functions as a link, provide alt text that helps convey the function. For instance,
Images should have text alternatives that describe the information or function represented.
@accessibility
- To stack multiple avatars together, use <%= link_to_component(Primer::Beta::AvatarStack) %>.
- Set `size` to update the height and width of the `Avatar` in pixels.
- By default, `Avatar` will render a static `<img>`. To have `Avatar` function as a link, set the `href` which will wrap the `<img>` in a `<a>`.
for organizations or any other non-human avatars.
- Use the default circle avatar for users, and the square shape
`Avatar` can be used to represent users and organizations on GitHub.

def call 

def call
  if @href
    render(Primer::Beta::Link.new(href: @href, classes: @system_arguments[:classes])) do
      render(Primer::BaseComponent.new(**@system_arguments.except(:classes))) { content }
    end
  else
    render(Primer::BaseComponent.new(**@system_arguments)) { content }
  end
end

def initialize(src:, alt: nil, size: DEFAULT_SIZE, shape: DEFAULT_SHAPE, href: nil, **system_arguments)

Parameters:
def initialize(src:, alt: nil, size: DEFAULT_SIZE, shape: DEFAULT_SHAPE, href: nil, **system_arguments)
  @href = href
  @system_arguments = deny_tag_argument(**system_arguments)
  @system_arguments[:tag] = :img
  @system_arguments[:src] = src
  @system_arguments[:alt] = alt
  @system_arguments[:size] = fetch_or_fallback(SIZE_OPTIONS, size, DEFAULT_SIZE)
  @system_arguments[:height] = @system_arguments[:size]
  @system_arguments[:width] = @system_arguments[:size]
  @system_arguments[:classes] = class_names(
    system_arguments[:classes],
    "avatar",
    "avatar-small" => size < SMALL_THRESHOLD,
    "circle" => shape == DEFAULT_SHAPE,
    "lh-0" => href # Addresses an overflow issue with linked avatars
  )
end