returns all the registered useravatarresolver descriptors . concode_field_sep Logger LOGGER concode_elem_sep Pattern iconSizeRegex concode_field_sep String resolve concode_elem_sep String resolveOrNull concode_elem_sep String findAvatarFor
ExtensionList < UserAvatarResolver > function ( ) { return ExtensionList . lookup ( UserAvatarResolver . class ) ; }