local MAJOR, MINOR = "AceComm-3.0", 7

local AceComm,oldminor = LibStub:NewLibrary(MAJOR, MINOR)

if not AceComm then return end

...
stuff
...

local mixins = {
    "RegisterComm",
    "UnregisterComm",
    "UnregisterAllComm",
    "SendCommMessage",
}

-- Embeds AceComm-3.0 into the target object making the functions from the mixins list available on target:..
-- @param target target object to embed AceComm-3.0 in

function AceComm:Embed(target)
    for k, v in pairs(mixins) do
        target[v] = self[v]
    end
    self.embeds[target] = true
    return target
end

-- Update embeds
for target, v in pairs(AceComm.embeds) do
    AceComm:Embed(target)
end