Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Affie

src/Deprecated.jl

@@ -129,7 +129,7 @@ end
 
 function getVariableTypeName(v::VariableSummary)
     Base.depwarn("getVariableTypeName is deprecated.", :getVariableTypeName)
-    return v.statekindsymbol
+    return v.statekind
 end
 
 function getMetadata(dfg::AbstractDFG, label::Symbol, key::Symbol)

src/serialization/StateSerialization.jl

@@ -14,7 +14,7 @@ function lowerStateKind(varT::AbstractStateType{N}) where {N}
     else
         throw(
             SerializationError(
-                "Serializing Variable State type only supports an integer parameter, got '$(T)'.",
+                "Serializing Variable State type only supports an integer parameter, got '$(N)'.",
             ),
         )
     end
@@ -128,7 +128,7 @@ function unpackOldState(d)
 
     # 
     label = Symbol(d.solveKey)
-    !isempty(d.covar) && error("covar field is not suppoted")
+    !isempty(d.covar) && error("covar field is not supported")
     if label == :parametric
         belief =
             BeliefRepresentation(GaussianDensityKind(), T; means = vals, covariances = [BW])

src/services/CustomPrinting.jl

@@ -59,8 +59,9 @@ function printVariable(
             println(ioc, "      marginalized:      ", isMarginalized(vert, :default))
             println(ioc, "      size bel. samples: ", size(vnd.belief.points))
             print(ioc, "      kde bandwidths:    ")
-            if 0 < length(vnd.belief.bandwidth)
-                println(ioc, round.(vnd.belief.bandwidth; digits = 4))
+            bandwidth = vnd.belief.bandwidth
+            if !isnothing(bandwidth) && 0 < length(bandwidth)
+                println(ioc, round.(bandwidth; digits = 4))
             end
             printstyled(ioc, "     VNDs: "; bold = true)
             println(ioc, solk[smsk], 4 < lsolk ? "..." : "")