get_source_marks_at_iter
  
  Description:
  public SList<
unowned Mark> 
get_source_marks_at_iter (
TextIter iter, 
string? category)
  
 
  
    Returns the list of marks of the given category at iter.
    If category is null it returns all marks at iter.
    Parameters:
    
      
        | this | a Buffer. | 
      
        | iter | an iterator. | 
      
        | category | category to search for, or null | 
    
    Returns: