Function isValidRDSInstanceClass

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

console.log(isValidRDSInstanceClass('db.m5.large')) // true
console.log(isValidRDSInstanceClass('db.m5.invalid')) // false
console.log(isValidRDSInstanceClass('db.t3.micro')) // true
```
- Defined in rds.ts:230