Method Iterator()->next()
- Method
next
 optionalboolnext()- Description
 If this function is defined it should advance the iterator one step, just like
`+=(1)would do.- Note
 This is the preferred way to advance the iterator, since it reduces the overhead.
- Note
 This function was optional in Pike 7.6 and earlier.
- Returns
 Returns 1 if it succeeded in advancing, and 0 (zero) if it has reached the end of the iterator.
- See also