# File lib/action_mailer/part.rb, line 43 def initialize(params) @content_type = params[:content_type] @content_disposition = params[:disposition] || "inline" @charset = params[:charset] @body = params[:body] @filename = params[:filename] @transfer_encoding = params[:transfer_encoding] || "quoted-printable" @headers = params[:headers] || {} @parts = [] end