fix: same ref name

[shaohuzhang1]

fix: same ref name

[shaohuzhang1]

The code provided is mostly correct but has a few minor improvements that can be made:

1. Consistent Naming Conventions: The naming convention for inputVariableCascaderRef might not match the actual component if 'inputField' were intended to reference something different.

2. Validation Logic Duplication: Both nodeCascaderRef and inputVariableCascaderRef have identical validation logic in their promises without using an abstracted method like validateChild. Consider extracting this logic into its own function and calling it from both places to avoid repetition.

3. Documentation Comments: It would help readability to add JSDoc comments describing what each part of the code does, especially with complex components or functions.

Here's the updated and improved version of the code:

// Import necessary library imports here

/**
 * Component responsible for variable splitting
 */
const VariableSplittingContent = defineComponent({
  setup(props) {
    // ... previous variables ...

    /**
     * Refers to the cascader component
     */
    const nodeCascaderRef = ref<NodeCascader>()

    /**
     * Refers to the second cascader (if needed)
     */
    const inputVariableCascaderRef = ref<NodeCascader>()

    const validate = async () => {
      return Promise.all([
        nodeCascaderRef.value ? await validateChild(nodeCascaderRef.value) : Promise.resolve(''),
+        inputVariableCascaderRef.value
          ? await validateChild(inputVariableCascaderRef.value)
          : Promise.resolve('')
      ])
        .catch((err: any) => {
          throw { node: props.nodeModel, errMessage: err }
        });
    }

    // other methods...

    return (
      <div>
        {/* ... */}
      </div>
    )
  },
})

function validateChild(componentInstance: NodeCascader) {
  if (componentInstance && typeof componentInstance.validate === 'function') {
    return componentInstance.validate();
  } else {
    console.error(`${componentInstance?.constructor.name} needs to implement \`validate\` method.`);
    return '';
  }
}

These changes aim to improve code maintainability and readability while fixing a redundant section and ensuring consistent use throughout the component.

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