Returns the previous #GtkSourceMark in the buffer or %NULL if the mark was not added to a buffer. If there is no previous mark, %NULL is returned.
If @category is %NULL, looks for marks of any category
a string specifying the mark category, or %NULL.
Return: the previous #GtkSourceMark, or %NULL.
2.2
See Implementation
Returns the previous #GtkSourceMark in the buffer or %NULL if the mark was not added to a buffer. If there is no previous mark, %NULL is returned.
If @category is %NULL, looks for marks of any category