Optionalis_Optional. True, if the link preview is disabled
Optionalprefer_Optional. True, if the media in the link preview is supposed to be enlarged; ignored if the URL isn't explicitly specified or media size change isn't supported for the preview
Optionalprefer_Optional. True, if the media in the link preview is supposed to be shrunk; ignored if the URL isn't explicitly specified or media size change isn't supported for the preview
Optionalshow_Optional. True, if the link preview must be shown above the message text; otherwise, the link preview will be shown below the message text
OptionalurlOptional. URL to use for the link preview. If empty, then the first URL found in the message text will be used
Describes the options used for link preview generation.