* check if an asset exists via loose coupling * Update frame/support/src/traits/tokens/fungibles.rs Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com> Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com> Co-authored-by: parity-processbot <>