InlineCompletionItem  
  constructor(insertText: String, range: Range = definedExternally, command: Command = definedExternally)(source)
Creates a new inline completion item.
Parameters
insertText 
The text to replace the range with.
range
The range to replace. If not set, the word at the requested position will be used.
command
An optional Command that is executed after inserting this completion.
constructor(insertText: SnippetString, range: Range = definedExternally, command: Command = definedExternally)(source)