CompareDashboardVersionsCommand computes the JSON diff of two versions, assigning the delta of the diff to the `Delta` field.

ErrNilDiff occurs when two compared interfaces are identical.

ErrUnsupportedDiffType occurs when an invalid diff type is used.

A BasicBlock represents a top-level element in a basic diff.

A BasicChange represents the change from an old to new value.

A BasicDiff holds the stateful values that are used when generating a basic diff from JSON tokens.

A BasicSummary represents the changes within a basic block that're too deep or verbose to be represented in the top-level BasicBlock element, or in the BasicChange.

JSONLine contains the data required to render each line of the JSON diff and contains the data required to produce the tokens output in the basic diff.