Operad := examples::DendriformOperad():

Trees := Operad::basisIndices:

Tree5 := Operad(Trees([1,[],[2,[]]])):

Tree6 := Operad(Trees([2,[1,[],[]],[3,[]]])):

Operad::composition(Tree5, Tree6, 1)

2   +  2

/ \    / \

1 3    1 4

   \    /

   4    3