code: function getThisArgumentOfCall(node) {
              if (node.kind === 174 /* CallExpression */) {
                  var callee = node.expression;
                  if (callee.kind === 172 /* PropertyAccessExpression */) {
                      return callee.expression;
                  }
                  else if (callee.kind === 173 /* ElementAccessExpression */) {
                      return callee.expression;
                  }
              }
          }
docs: Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.