Comparing absinthe schema definition to graphql-elixir schema definition

absinthe_example.ex

defmodule TestSchema do
  use Absinthe.Schema

  query do
    @desc "A Greeting"
    field :greeting, :string do  
      @desc "The name of who you'd like to greet"
      arg :name, :string
      resolve &greeting/3
    end
  end

  defp greeting(_, %{name: name}, _), do: {:ok, "Hello, #{name}!"}
  defp greeting(_, _, _), do: {:ok, "Hello, world!"}

end

graphql_elixir_example.ex

defmodule TestSchema do
  def schema do
    %GraphQL.Schema{
      query: %GraphQL.Type.ObjectType{
        name: "RootQueryType",
        fields: %{
          greeting: %{
            type: %GraphQL.Type.String{},
            resolve: &TestSchema.greeting/3,
            description: "Greeting",
            args: %{
              name: %{type: %GraphQL.Type.String{}, description: "The name of who you'd like to greet."},
            }
          }
        }
      }
    }
  end

  def greeting(_, %{name: name}, _), do: "Hello, #{name}!"
  def greeting(_, _, _), do: "Hello, world!"
end