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tests/cases/compiler/genericFunctionsWithOptionalParameters2.ts(7,1): error TS2346: Supplied parameters do not match any signature of call target.
==== tests/cases/compiler/genericFunctionsWithOptionalParameters2.ts (1 errors) ====
interface Utils {
fold<T, S>(c: Array<T>, folder?: (s: S, t: T) => T, init?: S): T;
}
var utils: Utils;
utils.fold(); // error
~~~~~~~~~~~~
!!! error TS2346: Supplied parameters do not match any signature of call target.
utils.fold(null); // no error
utils.fold(null, null); // no error
utils.fold(null, null, null); // error: Unable to invoke type with no call signatures
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