Get the GtkTextIter at which the completion for proposal starts. When implemented, the completion can use this information to position the completion window accordingly when a proposal is selected in the completion window.
A GtkSourceCompletionContext
A GtkSourceCompletionProposal
A GtkTextIter
TRUE if iter was set for proposal, FALSE otherwise
See Implementation
Get the GtkTextIter at which the completion for proposal starts. When implemented, the completion can use this information to position the completion window accordingly when a proposal is selected in the completion window.