nl_tokens: The base implementation of _ . pickBy without support for iteratee shorthands .
pl_tokens: function basePickBy ( object , props , predicate ) { var index = - 1 , length = props . length , <mask> = { } ; while ( ++ index < length ) { var key = props [ index ] , value = object [ key ] ; if ( predicate ( value , key ) ) { baseAssignValue ( result , key , value ) ; } } return result ; }