nl_tokens: Undefine a type .
pl_tokens: function undefineType ( type ) { var validator ; var typeDef = parseTypeDef ( type ) ; var regKey = typeDef . name . toLocaleLowerCase ( ) ; if ( primitives [ regKey ] ) { throw TypeException ( 'Cannot undefine primitive type `{{type}}`' , null , null , { <mask> : typeDef . name } ) ; } validator = registry [ regKey ] && registry [ regKey ] . validator ; delete registry [ regKey ] ; return validator || false ; }