/**
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								Check if [`argv`](https://nodejs.org/docs/latest/api/process.html#process_process_argv) has a specific flag.
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								@param flag - CLI flag to look for. The `--` prefix is optional.
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								@param argv - CLI arguments. Default: `process.argv`.
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								@returns Whether the flag exists.
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								@example
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								```
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								// $ ts-node foo.ts -f --unicorn --foo=bar -- --rainbow
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								// foo.ts
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								import hasFlag = require('has-flag');
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								hasFlag('unicorn');
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								//=> true
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								hasFlag('--unicorn');
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								//=> true
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								hasFlag('f');
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								//=> true
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								hasFlag('-f');
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								//=> true
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								hasFlag('foo=bar');
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								//=> true
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								hasFlag('foo');
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								//=> false
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								hasFlag('rainbow');
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								//=> false
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								```
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								*/
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								declare function hasFlag(flag: string, argv?: string[]): boolean;
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								export = hasFlag;
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