AdjustDescendentSVCount returns all the unique stat var under curID.

BuildParentSvgMap gets the mapping of svg/sv id to the parent svg for that svg/sv.

BuildStatVarSearchIndex builds the search index for the stat var hierarchy.

FilterSVG filters StatVarGroups based on given stat vars.

GetSVGAncestors returns EntityInfo of SVG ancestors for an SVG from the Mixer cache.

MergeSVGNodes merges node2's svg and svs into node1.

RemoveSvg removes the blocked svg from the in-memory entries.

SvgRoot is the root stat var group of the hierarchy.