Dnsimple.Domains.list_domains

You're seeing just the function list_domains, go back to Dnsimple.Domains module for more information.
Link to this function

list_domains(client, account_id, options \\ [])

Lists the domains in an account.

See:

Examples:

client = %Dnsimple.Client{access_token: "a1b2c3d4"}
{:ok, response} = Dnsimple.Domains.list_domains(client, account_id = 1010)
{:ok, response} = Dnsimple.Domains.list_domains(client, account_id = 1010, sort: "name:asc")
{:ok, response} = Dnsimple.Domains.list_domains(client, account_id = 1010, per_page: 50, page: 4)
{:ok, response} = Dnsimple.Domains.list_domains(client, account_id = 1010, filter: [name_like: ".com"])