code: 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;
  }
docs: Create validator functions set for the specified container or property.
  
  @private
  @param {Object.<string,module:x2node-validators.validator>} base Base
  validator functions set from the context.
  @param {Object} subjDef Subject definition object possibly containing a
  <code>validatorDefs</code> attribute.
  @param {string} subjDescription Subject description for error messages.
  @returns {Object.<string,module:x2node-validators.validator>} validator
  functions set to use for the subject.