Function assertIfDefined

assertIfDefined(
    value: unknown,
    condition: unknown,
    message?: string,
): asserts condition
Conditionally asserts a condition only when a value is defined. Does nothing if the value is undefined or null.
Parameters
- value: unknown
  The value to check for definedness.
- condition: unknown
  The condition to assert if value is defined.
- Optionalmessage: string
  Optional error message to throw if the assertion fails.
Returns asserts condition
Throws
Error if value is defined and condition is falsy.
Example
```
assertIfDefined(user, user?.age >= 18, 'User must be an adult')
```
- Defined in packages/pdf-lite/src/utils/assert.ts:33