the Formula used to calculate the amendment to token's existing value
the function used to append the existing value typed T with formula's result typed R
the Tokens that need to be evaluated before this DataFlowOperation can be evaluated
the Tokens that need to be evaluated before this DataFlowOperation can be evaluated
this Token wil be represented by the value calculated using formula and howToAmend in runtime
this Token wil be represented by the value calculated using formula and howToAmend in runtime
IncrementalOperation is an advanced implementation of DataFlowOperation.
To create a IncrementalOperation, use helper methods [Token.+=]]
12/15/17.