Add template functions

[jmwilliams89]

Description of Changes

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• Add a changelog entry (for non-trivial bug fixes / features)
• CI passes

[camdencheek]

Looks great. That was simpler than I was expecting

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	3.0345325	-0.7931738	28.599676	-0.413929
1	5000	7.775998	-1.0519123	41.2205	+0.7416496
1	10000	13.069195	-0.948472	52.00283	-2.555088
1	10000	13.569379	-0.44828796	53.08486	-1.4730568
1	50000	57.93423	-0.108695984	206.72562	+38.363678
1	100000	104.87287	-3.327034	276.23236	-3.736786
10	100	5.1725864	+0.4655733	31.218212	+0.004983902
10	100	5.03457	+0.3275571	30.897224	-0.3160038
10	500	9.276021	-1.0689545	38.251347	-1.9016724
10	1000	15.327847	+0.2413845	54.2896	+3.4014015
10	5000	63.17062	-4.056118	149.4771	-2.3581696
10	5000	65.881	-1.3457413	201.73734	+49.90207
10	10000	116.75259	-16.86567	330.24112	-4.8153076

[codecov]

Codecov Report

Merging #84 into master will decrease coverage by 0.05%.
The diff coverage is 55.56%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
- Coverage   74.62%   74.57%   -0.05%     
==========================================
  Files          66       66              
  Lines        3983     3991       +8     
==========================================
+ Hits         2972     2976       +4     
- Misses        760      764       +4     
  Partials      251      251              

Impacted Files	Coverage Δ
operator/plugin.go	90.80% <55.56%> (-4.13%)	⬇️

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