Variables
Const READ_METHODS
READ_METHODS: Set<string> = new Set([ 'GET', 'HEAD' ])
Const SUPPORTED_METHODS
SUPPORTED_METHODS: Set<string> = new Set([ ...READ_METHODS, ...WRITE_METHODS ])
Const WRITE_METHODS
WRITE_METHODS: Set<string> = new Set([ 'POST', 'PUT', 'DELETE' ])