abstract type AbstractTask end

abstract type AbstractComputeTask  <: AbstractTask end
abstract type AbstractDataTask     <: AbstractTask end

struct FusedComputeTask{T1<:AbstractComputeTask, T2<:AbstractComputeTask} <: AbstractComputeTask
end

get_types(::FusedComputeTask{T1, T2}) where {T1, T2} = (T1, T2)