Since Go strings are immutable, the bytes passed to <code>String</code> must not be modified afterwards.
[<a href="#Go_1.20">Go 1.20</a>]
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<p>
The function <code>StringData</code> returns a pointer to the underlying bytes of the <code>str</code> argument.
For an empty string the return value is unspecified, and may be <code>nil</code>.