How to use the @remirror/core.isElementDOMNode function in @remirror/core

getAttrs: node => {
            if (!isElementDOMNode(node)) {
              return false;
            }

            const codeElement = node.querySelector('code');

            if (!isElementDOMNode(codeElement)) {
              return false;
            }

            const language = codeElement.getAttribute(dataAttribute);
            return { language };
          },
        },

getAttrs: node => {
            if (!isElementDOMNode(node)) {
              return false;
            }

            const codeElement = node.querySelector('code');

            if (!isElementDOMNode(codeElement)) {
              return false;
            }

            const language = codeElement.getAttribute(dataAttribute);
            return { language };
          },
        },

getAttrs: node => {
            if (!isElementDOMNode(node)) {
              return false;
            }

            const id = node.getAttribute(dataAttributeId);
            const name = node.getAttribute(dataAttributeName);
            const label = node.innerText;
            return { id, label, name };
          },
        },

          getAttrs: node => (isElementDOMNode(node) && node.style.fontWeight !== 'normal' ? null : false),
        },

          getAttrs: domNode => (isElementDOMNode(domNode) ? getAttrs(this.getExtraAttrs(domNode)) : {}),
        },

export const findTextNode = (node: Node, text: string): Node | undefined => {
  if (isTextDOMNode(node)) {
    return node;
  } else if (isElementDOMNode(node)) {
    for (let ch = node.firstChild; ch; ch = ch.nextSibling) {
      const found = findTextNode(ch, text);
      if (found) {
        return found;
      }
    }
  }
  return undefined;
};

          getAttrs: node => (isElementDOMNode(node) && node.style.fontWeight !== 'normal' ? null : false),
        },

getAttrs: node => {
            if (!isElementDOMNode(node)) {
              return {};
            }

            return {
              order: +(node.getAttribute('start') ?? 1),
            };
          },
        },