appendMarkdown 
  Appends the given string 'as is' to this markdown string. When {@linkcode MarkdownString.supportThemeIcons supportThemeIcons} is true, ThemeIcons in the value will be iconified.
Parameters
value
Markdown string.
Appends the given string 'as is' to this markdown string. When {@linkcode MarkdownString.supportThemeIcons supportThemeIcons} is true, ThemeIcons in the value will be iconified.
Markdown string.