What is proc and method in react javascript?

Question

I'm learning about HOC from this article but have not see proc and method before. What does those refer to?

function refsHOC(WrappedComponent) {
  return class RefsHOC extends React.Component {
    proc(wrappedComponentInstance) {
      wrappedComponentInstance.method()
    }

    render() {
      const props = Object.assign({}, this.props, {ref: this.proc.bind(this)})
      return <WrappedComponent {...this.props}/>
    }
  }
}

Answer 1

this.proc refers to the method

proc(wrappedComponentInstance) {
  wrappedComponentInstance.method()
}

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wrappedComponentInstance.method() is a just an example of how to call an arbitrary method on the wrapped component. The article says:

In the following example we explore how to access instance methods and the instance itself of the WrappedComponent via refs

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So, neither has anything to do with React specifically.