Readability.is_response_markup

You're seeing just the function is_response_markup, go back to Readability module for more information.
Link to this function

is_response_markup(headers)

Specs

is_response_markup(headers()) :: boolean()

Return true if Content-Type in provided headers list is a markup type, else false

Example

iex> Readability.is_response_markup?([{"Content-Type", "text/html"}])
true