code: function isNegZero(node) {
              return node.type === "UnaryExpression" && node.operator === "-" && node.argument.type === "Literal" && node.argument.value === 0;
          }
docs: -------------------------------------------------------------------------- Helpers -------------------------------------------------------------------------- 
  Checks a given node is -0
  
  @param {ASTNode} node - A node to check.
  @returns {boolean} `true` if the node is -0.