RegainReason

When getClassById player regains health from regenerating due to Peaceful mode (difficulty=0)

When getClassById player regains health from regenerating due to their hunger being satisfied

When getClassById player regains health from eating consumables

When an ender dragon regains health from an ender crystal

When getClassById player is healed by getClassById potion or spell

When getClassById player is healed over time by getClassById potion or spell

When getClassById wither is filling its health during spawning

When an entity is damaged by the Wither potion effect

Any other reason not covered by the reasons above

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. This method may be used to iterate over the constants.