Returns the index of the nearest bit that is set to {@code false}
that occurs on or before the specified starting index.
If no such bit exists, or if {@code -1} is given as the
starting index, then {@code -1} is returned.
@param fromIndex the index to start checking from (inclusive)
@return the index of the previous clear bit, or {@code -1} if there
is no such bit
@throws IndexOutOfBoundsException if the specified index is less
than {@code -1}
Returns the index of the nearest bit that is set to {@code false} that occurs on or before the specified starting index. If no such bit exists, or if {@code -1} is given as the starting index, then {@code -1} is returned.
@param fromIndex the index to start checking from (inclusive) @return the index of the previous clear bit, or {@code -1} if there is no such bit @throws IndexOutOfBoundsException if the specified index is less than {@code -1}