nl_tokens: if source is multisource
pl_tokens: function isMultisource ( arg ) { return <mask> . isArray ( arg ) && ! ( typeof arg [ 0 ] === 'number' && ( arg . length === 1 || typeof arg [ 1 ] === 'number' ) ) && ! ( arg . length < 32 && arg . every ( ch => Array . isArray ( ch ) || ArrayBuffer . isView ( ch ) ) ) }