toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() => '$runtimeType - '
    'studyId: $studyId, '
    'studyDeploymentId: $studyDeploymentId, '
    'device role: $deviceRoleName, '
    'participant id: $participantId, '
    'participant role: $participantRoleName, '
    'title: ${studyDescription?.title}, '
    'responsible: ${responsible?.name}';