UnifiedMergeConfig
constructor(original: Text, highlightChanges: Boolean = true, gutter: Boolean = true, syntaxHighlightDeletions: Boolean = true, allowInlineDiffs: Boolean = false, syntaxHighlightDeletionsMaxLength: Int = 3000, mergeControls: Boolean = true, diffConfig: DiffConfig = defaultDiffConfig, collapseUnchanged: CollapseConfig? = null)