--- List ---
[]
[one, two, three]
[one, two, three, four, null]

--- Set ---
[]
[one, two, three]
[null, four, one, two, three]

--- Map ---
{}
{2=two, 3=three, 1=one}
{1=one, 2=two, 3=three}
{1=one, 2=two, 3=three, 4=four, 5=null}

--- Map Entry ---
{}
{2=two, 3=three, 1=one}