Class MaterialApi

Recursively expand material's composition. direct is one level; flat aggregates leaf-element weight fractions. Pure elements with a chemistry.symbol contribute their full mass to their own symbol (so iron returns { Fe: 1 }); mixtures recursively expand.

Cycle-guarded: a composition reference back to an ancestor truncates the walk at that node (defensive — well-formed content shouldn't produce cycles).

Does material contain elementSymbol anywhere in its recursive composition? Walks the same expansion as compositionOf and consults the leaf elements' chemistry.symbol.

Every registered Material whose recursive composition contains the element identified by symbol. Combines compositionOf + containsElement over the index.

Every registered Material that carries tag. Tag matching is exact-string. The result reflects the runtime singleton index; Materials that haven't been cloned yet aren't there.

Resolve the Material at detailKey, falling through to the bulk default when no per-Detail override is set. Omit detailKey to read the bulk default directly. Returns null when stuff is not Tangible (or is Tangible but unset).

Sync; threads through Tangible.getMaterial, which uses findByTemplatePath for HMR safety.