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@blueprintjs/core

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/** Returns whether the value is a function. Acts as a type guard. */ export declare function isFunction(value: any): value is Function; /** * Safely invoke the function with the given arguments, if it is indeed a * function, and return its value. Otherwise, return undefined. * * @deprecated use TypeScript 3.7+ optional call operator func?.() */ export declare function safeInvoke<R>(func: (() => R) | undefined): R | undefined; export declare function safeInvoke<A, R>(func: ((arg1: A) => R) | undefined, arg1: A): R | undefined; export declare function safeInvoke<A, B, R>(func: ((arg1: A, arg2: B) => R) | undefined, arg1: A, arg2: B): R | undefined; export declare function safeInvoke<A, B, C, R>(func: ((arg1: A, arg2: B, arg3: C) => R) | undefined, arg1: A, arg2: B, arg3: C): R | undefined; export declare function safeInvoke<A, B, C, D, R>(func: ((arg1: A, arg2: B, arg3: C, arg4: D) => R) | undefined, arg1: A, arg2: B, arg3: C, arg4: D): R | undefined; /** * Safely invoke the provided entity if it is a function; otherwise, return the * entity itself. * * @deprecated use TypeScript 3.7+ optional call operator func?.() */ export declare function safeInvokeOrValue<R>(funcOrValue: (() => R) | R | undefined): R; export declare function safeInvokeOrValue<A, R>(funcOrValue: ((arg1: A) => R) | R | undefined, arg1: A): R; export declare function safeInvokeOrValue<A, B, R>(funcOrValue: ((arg1: A, arg2: B) => R) | R | undefined, arg1: A, arg2: B): R; export declare function safeInvokeOrValue<A, B, C, R>(funcOrValue: ((arg1: A, arg2: B, arg3: C) => R) | R | undefined, arg1: A, arg2: B, arg3: C): R; export declare function safeInvokeOrValue<A, B, C, D, R>(funcOrValue: ((arg1: A, arg2: B, arg3: C, arg4: D) => R) | R | undefined, arg1: A, arg2: B, arg3: C, arg4: D): R;