What

Fixed three incorrect code examples in the Reply and Request reference documentation:

1. Reply.md line 311 — reply.getTrailer('server-timing') replaced with reply.hasTrailer('server-timing'). The getTrailer() method does not exist on the Reply prototype — only trailer(), hasTrailer(), and removeTrailer() are implemented.

2. Reply.md line 499 — Fixed syntax error schema1.properties.foo.type. = 'integer' (extra dot before assignment operator).

3. Request.md line 237 — Same syntax error fix as above in the compileValidationSchema example.

Why

While working with Fastify, I noticed the removeTrailer example references a non-existent getTrailer() method, which would throw a TypeError at runtime if a user copied this code. The schema mutation examples also have a syntax error that would cause a SyntaxError if used directly.

How

• Verified getTrailer does not exist in lib/reply.js — only trailer, hasTrailer, and removeTrailer are defined
• Replaced with hasTrailer() which correctly demonstrates verifying the trailer was removed
• Removed the extra dot in the assignment to fix the syntax errors

Checklist

• I have read the CONTRIBUTING.md
• Tests pass (npm run unit — 2204 pass, 0 fail)
• Lint passes (npm run lint and npm run lint:markdown)
• Documentation is changed
• Commit message and code follows the Developer's Certification of Origin