code: function isFirstBangInBangBangExpression(node) {
              return node && node.type === "UnaryExpression" && node.argument.operator === "!" &&
                  node.argument && node.argument.type === "UnaryExpression" && node.argument.operator === "!";
          }
docs: -------------------------------------------------------------------------- Helpers -------------------------------------------------------------------------- 
  Check if the node is the first "!" in a "!!" convert to Boolean expression
  @param {ASTnode} node AST node
  @returns {boolean} Whether or not the node is first "!" in "!!"