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symbolProperty35.ts(8,11): error TS2320: Interface 'I3' cannot simultaneously extend types 'I1' and 'I2'.
Named property '[Symbol.toStringTag]' of types 'I1' and 'I2' are not identical.
==== symbolProperty35.ts (1 errors) ====
interface I1 {
[Symbol.toStringTag](): { x: string }
}
interface I2 {
[Symbol.toStringTag](): { x: number }
}
interface I3 extends I1, I2 { }
~~
!!! error TS2320: Interface 'I3' cannot simultaneously extend types 'I1' and 'I2'.
!!! error TS2320: Named property '[Symbol.toStringTag]' of types 'I1' and 'I2' are not identical.
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