whole_func_string: function(errors) {
          var me = this,
              e, eLen, error, value,
              key;
  
          function mark(fieldId, msg) {
              var field = me.findField(fieldId);
              if (field) {
                  field.markInvalid(msg);
              }
          }
  
          if (Ext.isArray(errors)) {
              eLen = errors.length;
  
              for (e = 0; e < eLen; e++) {
                  error = errors[e];
                  mark(error.id, error.msg);
              }
          } else if (errors instanceof Ext.data.Errors) {
              eLen  = errors.items.length;
              for (e = 0; e < eLen; e++) {
                  error = errors.items[e];
  
                  mark(error.field, error.message);
              }
          } else {
              for (key in errors) {
                  if (errors.hasOwnProperty(key)) {
                      value = errors[key];
                      mark(key, value, errors);
                  }
              }
          }
          return this;
      }
func_code_string: function(errors) {
          var me = this,
              e, eLen, error, value,
              key;
  
          function mark(fieldId, msg) {
              var field = me.findField(fieldId);
              if (field) {
                  field.markInvalid(msg);
              }
          }
  
          if (Ext.isArray(errors)) {
              eLen = errors.length;
  
              for (e = 0; e < eLen; e++) {
                  error = errors[e];
                  mark(error.id, error.msg);
              }
          } else if (errors instanceof Ext.data.Errors) {
              eLen  = errors.items.length;
              for (e = 0; e < eLen; e++) {
                  error = errors.items[e];
  
                  mark(error.field, error.message);
              }
          } else {
              for (key in errors) {
                  if (errors.hasOwnProperty(key)) {
                      value = errors[key];
                      mark(key, value, errors);
                  }
              }
          }
          return this;
      }
func_documentation_string: Mark fields in this form invalid in bulk.
  @param {Object/Object[]/Ext.data.Errors} errors
  Either an array in the form `[{id:'fieldId', msg:'The message'}, ...]`,
  an object hash of `{id: msg, id2: msg2}`, or a {@link Ext.data.Errors} object.
  @return {Ext.form.Basic} this