src/Db/Database.php
public function getSchema() {
        if (!isset($this->_schema)) {
            /** @var SchemaInterface $schema */
            $schema = $this->createComponent(SchemaInterface::class);
            $this->_schema = $schema;
        }
        return $this->_schema;
    }
public function getSchema() {
        if (!isset($this->_schema)) {
            /** @var SchemaInterface $schema */
            $schema = $this->createComponent(SchemaInterface::class);
            $this->_schema = $schema;
        }
        return $this->_schema;
    }
Get Schema
@return SchemaInterface