It seems like $this->container->call(array($this, 'schema')) can also be of type callable; however, parameter $schema of Webtools\JsonSchemaReque...alidator::__construct() does only seem to accept array, maybe add an additional type check?
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Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation
This check looks for calls to methods that do not seem to exist on a given type.
It looks for the method on the type itself as well as in inherited classes or
implemented interfaces.
This is most likely a typographical error or the method has been renamed.