nl_tokens: Converts bef : aft to { _before : bef _after : aft } and resolves undefined before / after from parent or root
pl_tokens: function resolve ( value , key ) { // resolve before/after from root or parent if it isn't present on the current node if ( ! value . _parent ) return undefined ; // Immediate parent if ( value . _parent . _default && value . _parent . _default [ key ] ) return value . _parent . _default [ key ] ; // Root var root = value . _parent . _parent ; if ( ! root ) return undefined ; return root . _default ? <mask> . _default [ key ] : undefined ; }