code: 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();
  }
docs: Get the field informations.
  @param {string} fieldName - name or path of the field.
  @param {object} complementaryInformation - Additional informations to extend the domain informations.
  @return {object} - The builded field informations.