Resolve #3505766 "Adhere to coding"

Daniel Rodriguezrequested to merge
issue/graphql_webform-3505766:3505766-adhere-to-coding into 2.x

Applied a few changes to adhere to coding standards.

Disabled PHPCS Rule: Drupal.NamingConventions.ValidFunctionName.ScopeNotCamelCaps

Closes #3505766

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