AngularJs проверка массива объектов

export interface InspectionSchedule {
  id: number,
  propertyId: number,
  inspectionScheduleUnitArtifactDto: InspectionScheduleUnitArtifactDto[]
}

export interface InspectionScheduleUnitArtifactDto {
  id: number,
  inspectionScheduleUnitContactArtifactDto: InspectionScheduleUnitContactArtifactDto[]
}

export interface InspectionScheduleUnitContactArtifactDto {
  id: number,
  inspectionScheduleUnitArtifactId: number,
  primaryContactName: string
}

//Importing

containsZeroLengthArray(inspectionSchedule: InspectionSchedule) {
  return inspectionSchedule.inspectionScheduleUnitArtifactDto
    .some(contact => !contact.inspectionScheduleUnitContactArtifactDto.length);
}
SAMER SAEID