Duplicated swagger $refs on `Entity | Promise<Entity>` types

[alucky4eg]

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Expected Behavior

im using tsoa with typeorm with lazy loading:

export interface IUser extends _IBaseEntity {
  uuid: string;
  account: IAccount | Promise<IAccount>;
}

@Entity()
export class User extends _BaseUUIDEntity<User> implements IUser {
  @PrimaryColumn({ type: 'uuid' })
  public uuid: string;

  @ManyToOne(_type => Account, account => account.uuid, { lazy: true })
  @JoinColumn({ name: 'account_uuid' })
  public account: Promise<Account> | Account;
}

Current Behavior

after building swagger.json file i got this:

{
			"User": {
				"properties": {
					"uuid": {
						"type": "string"
					},
					"account": {
						"anyOf": [
							{
								"$ref": "#/components/schemas/Account"
							},
							{
								"$ref": "#/components/schemas/Account"
							}
						]
					}
				},
				"type": "object",
				"additionalProperties": false
			},
}

Version of the library:

• tsoa: 3.2.1@latest
• typeorm: 0.2.25@latest

• Confirm you were using yarn not npm: [x]

Detailed Description

filter refs and remove duplicated