Role enum
The database system has three types of users: user, securityOfficer, administrator.
Constants
- administrator → const Role
 - 
          
Role.administrator: Perform the tasks of all the above.
const Role(2) - securityOfficer → const Role
 - 
          
Role.securityOfficer: Manges users and passwords. Also, they perform backup and recovery operations.
const Role(1) - user → const Role
 - 
          
Role.user: Users who are allowed to perform only DML operations.
const Role(0) - 
          values
          → const List<
Role>  - 
          
A constant List of the values in this enum, in order of their declaration.
const List<Role>  
Properties
Methods
- 
          noSuchMethod(
Invocation invocation) → dynamic  - 
          Invoked when a non-existent method or property is accessed. [...]
                  inherited
 - 
          toString(
) → String  - 
          Returns a string representation of this object. 
                  override
 
Operators
- 
          operator ==(
Object other) → bool  - 
          The equality operator. [...]
                  inherited