Creates a stack. Mutable. Use Stacks.immutable for an immutable alternative.

// Create
const s = Stacks.mutable();
// Add one or more items
s.push(1, 2, 3, 4);

// See what's on top
s.peek; // 4

// Remove the top-most, and return it
s.pop(); // 4

// Now there's a new top-most element
s.peek; // 3