docs: function getFieldInformations(fieldName, complementaryInformation) {
      checkIsString('fieldName', fieldName);
      checkIsObject('complementaryInformation', complementaryInformation);
      const fieldPath = fieldName.split(SEPARATOR);
      if (computedEntityContainer.hasIn(fieldPath)) {
          return computedEntityContainer.getIn(fieldPath).toJS();
      }
      return _buildFieldInformation(fieldPath).mergeDeep(complementaryInformation).toJS();
  }