drupal-graphql / graphql

      foreach ($manager->getDefinitions() as $id => $definition) {

        $parents = $definition['parents'] ?: ['Root'];

        foreach ($parents as $parent) {

          $placeholder = &$this->fieldMap[$parent][$definition['name']];

          if (!empty($placeholder)) {

            // Do not override if the existing plugin has a higher weight.

            $existing = $this->getPluginDefinition(GRAPHQL_FIELD_PLUGIN, $placeholder);

            if ($existing['weight'] > $definition['weight']) {

              continue;

            }

          }

          $placeholder = $id;

        }

      }

    }

    $this->mutationMap = [];

    foreach ($this->pluginManagers->getPluginManagers(GRAPHQL_MUTATION_PLUGIN) as $manager) {

      foreach ($manager->getDefinitions() as $id => $definition) {

        $placeholder = &$this->mutationMap[$definition['name']];

        if (!empty($placeholder)) {

          // Do not override if the existing plugin has a higher weight.

          $existing = $this->getPluginDefinition(GRAPHQL_MUTATION_PLUGIN, $placeholder);

          if ($existing['weight'] > $definition['weight']) {

            continue;

          }

        }

        $placeholder = $id;

      }

    }

    return $this->mutationMap;