主题。 可选的值为:primary, success, danger, warning, info, secondary, none. 默认为 primary, 为 none 时不显示侧边框。
primary
success
danger
warning
info
secondary
none
see 整体结构说明。
Returns a representation of an immutable list of all enum entries, in the order they're declared.
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
Returns an array containing the constants of this enum type, in the order they're declared.