Write a method longestepquential sequence that returns the length of the longest

sequential sequence within a list of integers. For example, if a variable

called list stores the following sequence of values:

$1,2,3,2,9,7,-3,0,42,308,17$

then the call: $11st.$ longestsequentialsequenoe $()$ would return the value $3$ because

it is the length of the longest sequential sequence within this list $($the sequence

$1,2,3.$ If the list is empty, your method should return $0.$ Notice that for a non$-$

empty list the method will always return a value of at least $1$ because any

individual element constitutes a sequential sequence.

Assume you are adding to the arrayIntList class with following fields: