HY-5259 add null checks

[robbecker-wf]

Problem

Uncaught exception trying to call a method on null reference

Solution

Add null checks and cancel the periodic timeout Timer if it hasn't already been cancelled once a result is available.

Testing

• CI passes

[rmconsole-wf]

General Information

Ticket(s):

• HY-5259 | remove

Code Review(s): #19

Reviewers: patkujawa-wf

Additional Information

Watchlist Notifications: None

	When this pull is merged I will add it to the following release:
	Version: font_face_observer 2.0.2
	Release Ticket(s): HY-5112, HY-5113

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Last updated on Wednesday, September 06 10:53 AM CST

[aviary-wf]

Raven

Number of Findings: 0

[semveraudit-wf]

Public API Changes

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[patkujawa-wf]

+1 CR

[patkujawa-wf]

+10 CI passed

[patkujawa-wf]

Quality Review Approval: +1

• Testing instruction
• Dev +1's
• Dev/QA +10 with detail of what was tested
• All unit tests pass
• Unit test created/updated
• Rosie has run and reports properly the release the ticket will be included in

@Workiva/release-management-p for merge into master

[rmconsole-wf]

+1 from RM