connectedComponents(DynkinDiagram) -- the connected components of a Dynkin diagram

i1 : R=rootSystemE(6)++rootSystemF4

o1 = RootSystem{...8...}

o1 : RootSystem

i2 : D=dynkinDiagram(R)

o2 = DynkinDiagram{{{3}, {}, {}, {}, {}}, {{4}, {}, {}, {}, {}}, {{1, 4}, {}, {}, {}, {}}, {{2, 3, 5}, {}, {}, {}, {}}, {{4, 6}, {}, {}, {}, {}}, {{5}, {}, {}, {}, {}}, {{8}, {}, {}, {}, {}}, {{7}, {9}, {}, {}, {}}, {{10}, {}, {8}, {}, {}}, {{9}, {}, {}, {}, {}}}

o2 : DynkinDiagram

i3 : connectedComponents(D)

o3 = {DynkinDiagram{{{3}, {}, {}, {}, {}}, {{4}, {}, {}, {}, {}}, {{1, 4},
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     {}, {}, {}, {}}, {{2, 3, 5}, {}, {}, {}, {}}, {{4, 6}, {}, {}, {}, {}},
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     {{5}, {}, {}, {}, {}}}, DynkinDiagram{{{2}, {}, {}, {}, {}}, {{1}, {3},
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     {}, {}, {}}, {{4}, {}, {2}, {}, {}}, {{3}, {}, {}, {}, {}}}}

o3 : List