[fix] #4014: Use method(not field) access in client

[mversic]

Description

Linked issue

Closes #4014

Benefits

Checklist

• I've read CONTRIBUTING.md
• I've used the standard signed-off commit format (or will squash just before merging)
• All applicable CI checks pass (or I promised to make them pass later)
• (optional) I've written unit tests for the code changes
• I replied to all comments after code review, marking all implemented changes with thumbs up

[coveralls]

Pull Request Test Coverage Report for Build 6640420272

• 1 of 10 (10.0%) changed or added relevant lines in 3 files are covered.
• 6906 unchanged lines in 129 files lost coverage.
• Overall coverage decreased (-3.6%) to 55.884%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
client_cli/src/main.rs	0	3	0.0%
client/src/client.rs	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
client/src/lib.rs	1	0.0%
config/base/derive/src/view.rs	1	99.37%
config/src/block_sync.rs	1	95.0%
config/src/network.rs	1	93.75%
config/src/torii.rs	1	96.0%
config/src/wasm.rs	1	87.5%
core/src/smartcontracts/isi/block.rs	1	87.5%
config/src/kura.rs	2	79.41%
config/src/lib.rs	2	0.0%
ffi/src/option.rs	2	71.43%

Totals
Change from base Build 5423219773:	-3.6%
Covered Lines:	22082
Relevant Lines:	39514

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💛 - Coveralls