Function isValidRDSInstanceClass

isValidRDSInstanceClass(instanceClass: string): Promise<boolean>
Check if an RDS instance class exists in the dataset.
Parameters
- instanceClass: string
  The instance class to check
Returns Promise<boolean>
Promise resolving to true if the instance class exists, false otherwise
Example
```
import { isValidRDSInstanceClass } from 'aws-instance-info/async'

console.log(await isValidRDSInstanceClass('db.m5.large')) // true
console.log(await isValidRDSInstanceClass('db.m5.invalid')) // false
console.log(await isValidRDSInstanceClass('db.t3.micro')) // true
```
- Defined in rds.async.ts:296