Material in PICO design system is made up of two colors with blend mode.
No material.
The Material of the base layer e.g：Window、Augment、Tab Bar、Tool Bar.
The Material of the elevated layer that occupy a large area e.g：Dialog Alert、Sheet、Menu.
The Material of the elevated layer that occupy a small area e.g：Tooltip、Text Selector.
The Material of the elevated layer that occupy a small area e.g：Box、Button、CheckBox. Currently, It has no effect for the Window.
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.