nl_tokens: A sub - routine of the { @linkcode partiallyOptimizeFilter } used to generate optimization result if the storage key path matches the field paths in the filter object .
pl_tokens: function partiallyOptimizeKeyPathMatchingFilter ( filter , keyPath ) { let keyRange = convertFieldMapToKeyRange ( filter , keyPath ) if ( ! keyRange ) { // at least one of the values is a IDBKeyRange instance return { keyRange : undefined , filter : compileFieldRangeFilter ( filter ) , <mask> : 0 } } return { keyRange , filter : null , score : 1 } }