src/Type/Schema.php
public function validate()
    {
        // If this Schema has already been validated, return the previous results.
        if ($this->validationErrors !== null) {
            return $this->validationErrors;
        }
        // Validate the schema, producing a list of errors.
        $context = new SchemaValidationContext($this);
        $context->validateRootTypes();
        $context->validateDirectives();
        $context->validateTypes();

        // Persist the results of validation before returning to ensure validation
        // does not run multiple times for this schema.
        $this->validationErrors = $context->getErrors();

        return $this->validationErrors;
    }
public function validate()
    {
        // If this Schema has already been validated, return the previous results.
        if ($this->validationErrors !== null) {
            return $this->validationErrors;
        }
        // Validate the schema, producing a list of errors.
        $context = new SchemaValidationContext($this);
        $context->validateRootTypes();
        $context->validateDirectives();
        $context->validateTypes();

        // Persist the results of validation before returning to ensure validation
        // does not run multiple times for this schema.
        $this->validationErrors = $context->getErrors();

        return $this->validationErrors;
    }
Validates schema.

This operation requires full schema scan. Do not use in production environment.

@return InvariantViolation[]|Error[]

@api