Returns whether this function is a generator

# ReflectionFunctionAbstract::isGenerator

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

ReflectionFunctionAbstract::isGenerator — Returns whether this function is a generator

### Description

public ReflectionFunctionAbstract::isGenerator(): bool

### Parameters

This function has no parameters.

### Return Values

Returns `true` if the function is generator, `false` if it is not or `null` on failure.

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