src/elements/Step/StepContent.js
function StepContent(props) {
  const { children, className, content, description, title } = props
  const classes = cx('content', className)
  const rest = getUnhandledProps(StepContent, props)
  const ElementType = getElementType(StepContent, props)

  if (!childrenUtils.isNil(children)) {
    return (
      <ElementType {...rest} className={classes}>
        {children}
      </ElementType>
    )
  }
  if (!childrenUtils.isNil(content)) {
    return (
      <ElementType {...rest} className={classes}>
        {content}
      </ElementType>
    )
  }

  return (
    <ElementType {...rest} className={classes}>
      {StepTitle.create(title, { autoGenerateKey: false })}
      {StepDescription.create(description, { autoGenerateKey: false })}
    </ElementType>
  )
}
function StepContent(props) {
  const { children, className, content, description, title } = props
  const classes = cx('content', className)
  const rest = getUnhandledProps(StepContent, props)
  const ElementType = getElementType(StepContent, props)

  if (!childrenUtils.isNil(children)) {
    return (
      <ElementType {...rest} className={classes}>
        {children}
      </ElementType>
    )
  }
  if (!childrenUtils.isNil(content)) {
    return (
      <ElementType {...rest} className={classes}>
        {content}
      </ElementType>
    )
  }

  return (
    <ElementType {...rest} className={classes}>
      {StepTitle.create(title, { autoGenerateKey: false })}
      {StepDescription.create(description, { autoGenerateKey: false })}
    </ElementType>
  )
}
A step can contain a content.