code: function isElement (node) {
    return node.callee.name === 'element' || (node.callee.property && node.callee.property.name === 'element')
  }
docs: The first four "is" functions below are simple helper functions that help to distinguish between `$` vs `element`, and `$$` vs `element.all` 
  Checks if a given node is an ElementFinder represented by element() callee - both nested and not
  
  @param {ASTNode} node - A node to check.
  @returns {boolean}