this method automatically generates "mixed" locales (like en_DE) if required
NOTE: this requires locale data to have been loaded before.
In the case of en_DE the library might need en_US and de_DE or en_UK and de_AT, depending on the users language priorities
if a list of preferred locales was specified via select, the language will be resolved using that list
e.g. with BG.locale.select(['de_AT']) a call to BG.locale.retrieve('de_US') will use the de_AT for translating names,
but with BG.locale.select(['de_DE']) a call to BG.locale.retrieve('de_US') will use de_DE instead
Parameters
Optionall: string
Optionalcb: (param:string[])=>any
an optional callback that is called with an array containing locales that are currently not available but required for the requested locale
get locale or timezone information
this method automatically generates "mixed" locales (like en_DE) if required
NOTE: this requires locale data to have been loaded before. In the case of
en_DEthe library might needen_USandde_DEoren_UKandde_AT, depending on the users language prioritiesif a list of preferred locales was specified via select, the language will be resolved using that list e.g. with BG.locale.select(['de_AT']) a call to BG.locale.retrieve('de_US') will use the de_AT for translating names, but with BG.locale.select(['de_DE']) a call to BG.locale.retrieve('de_US') will use de_DE instead