docs: function createValidatorFuncs(base, subjDef, subjDescription) {
  
  	if (!subjDef.validatorDefs && (base !== standard.VALIDATOR_DEFS))
  		return base;
  
  	const validatorFuncs = Object.create(base);
  	for (let validatorId in subjDef.validatorDefs) {
  		const validatorFunc = subjDef.validatorDefs[validatorId];
  		if ((typeof validatorFunc) !== 'function')
  			throw new common.X2UsageError(
  				'Validator definition "' + validatorId + '" on ' +
  					subjDescription + ' is not a function.');
  		validatorFuncs[validatorId] = validatorFunc;
  	}
  
  	return validatorFuncs;
  }