message: pricing - model reviewed
diff: -export interface PricingModel {
  +import { AuthorizationActions } from './Authorization';
  +import CreatedUpdatedProps from './CreatedUpdatedProps';
  +
  +export default interface Pricing extends CreatedUpdatedProps, AuthorizationActions {
  id: string;
  - description: string;
  - currency: string;
  - timestamp: Date;
  - pricings: Pricing[];
  + contextId: string;
  + pricingDefinitions: PricingDefinition[];
  }
  -export interface Pricing {
  - flatFee?: PricingComponent,
  - energy?: PricingComponent,
  - parkingTime?: PricingComponent,
  - chargingTime?: PricingComponent,
  - restrictions?: PricingRestriction;
  +export interface PricingDefinition {
  + restrictions?: PricingRestriction; // To be clarified! - These restrictions are so far common to all dimensions
  + dimensions: {
  + flatFee?: PricingDimension, // Flat fee, no unit
  + energy?: PricingDimension, // Defined in kWh, step_size multiplier: 1 Wh
  + chargingTime?: PricingDimension, // Time charging: defined in hours, step_size multiplier: 1 second
  + parkingTime?: PricingDimension, // Time not charging: defined in hours, step_size multiplier: 1 second
  + }
  }
  -export interface PricingComponent {
  +export interface PricingDimension {
  + active: boolean, // Lets the user switch OFF that price without loosing the value (if any)
  price: number, // Price per unit (excluding VAT) for this tariff dimension
  stepSize?: number, // Minimum amount to be billed. This unit will be billed in this step_size blocks. For example: if type is time and step_size is 300, then time will be billed in blocks of 5 minutes, so if 6 minutes is used, 10 minutes (2 blocks of step_size) will be billed.
  }
  @@ -43,13 +47,6 @@ export enum DayOfWeek {
  SUNDAY = 7
  }
  -// export enum PricingDimensionType {
  -// ENERGY = 'E', // Defined in kWh, step_size multiplier: 1 Wh
  -// FLAT = 'F', // Flat fee, no unit
  -// PARKING_TIME = 'PT', // Time not charging: defined in hours, step_size multiplier: 1 second
  -// TIME = 'T', // Time charging: defined in hours, step_size multiplier: 1 second
  -// }
  -
  // Interface exposed by the pricing integration layer
  export interface PricedConsumption {
  amount: number;
  