code: function isVariableDeclaration(node) {
              return (
                  node.type === "VariableDeclaration" ||
                  (
                      node.type === "ExportNamedDeclaration" &&
                      node.declaration &&
                      node.declaration.type === "VariableDeclaration"
                  )
              );
          }
docs: Checks whether a given node is a variable declaration or not.
  
  @param {ASTNode} node - any node
  @returns {boolean} `true` if the node is a variable declaration.