change cloudgraphs mergeUpdate api

Author: dehann

src/CloudGraphsDFG/services/CloudGraphsDFG.jl

@@ -220,11 +220,12 @@ function updateVariable!(dfg::CloudGraphsDFG, variable::DFGVariable)::DFGVariabl
     return variable
 end
 
-function mergeUpdateVariableSolverData!(dfg::CloudGraphsDFG, sourceVariable::DFGVariable)::DFGVariable
+function mergeVariableData!(dfg::CloudGraphsDFG, sourceVariable::DFGVariable)::DFGVariable
     if !exists(dfg, sourceVariable)
         error("Source variable '$(sourceVariable.label)' doesn't exist in the graph.")
     end
     for (k,v) in sourceVariable.ppeDict
+        # TODO what is happening inside, is this truely an update or is it a merge? (API consistency hounds are apon you)
         updatePPE!(dfg, getLabel(sourceVariable), v, k)
     end
     for (k,v) in sourceVariable.solverDataDict
@@ -233,6 +234,10 @@ function mergeUpdateVariableSolverData!(dfg::CloudGraphsDFG, sourceVariable::DFG
     return sourceVariable
 end
 
+function mergeUpdateVariableSolverData!(dfg::CloudGraphsDFG, sourceVariable::DFGVariable)::DFGVariable
+  mergeVariableData!(dfg, sourceVariable)
+end
+
 function updateFactor!(dfg::CloudGraphsDFG, factor::DFGFactor)::DFGFactor
     if !exists(dfg, factor)
         @warn "Factor label '$(factor.label)' does not exist in the factor graph, adding"