Emitted when --find-dead-code is turned on and Psalm cannot find any uses of a particular parameter in a public/protected method
<?php
class A {
public function foo(int $a, int $b) : int {
return $a + 4;
}
}
$a = new A();
echo $a->foo(1, 2);Can be suppressed by prefixing the parameter name with an underscore:
<?php
class A {
public function foo(int $a, int $_b) : int {
return $a + 4;
}
}