Merge pull request #215 from yuankunzhang/improve-api-encapsulation #755

Job	Run time
cargo clippy -- -D warnings (ubuntu-latest)	23s
cargo clippy -- -D warnings (macOS-latest)	1m 55s
cargo fmt --all -- --check	12s
cargo clippy -- -D warnings (windows-latest)	2m 55s
cargo check (macOS-latest)	14s
cargo check (ubuntu-latest)	9s
cargo test (macOS-latest)	28s
cargo check (windows-latest)	40s
cargo test (ubuntu-latest)	20s
Code Coverage (macos-latest, macos)	2m 23s
Code Coverage (ubuntu-latest, unix)	1m 38s
Minimum Supported Rust Version (ubuntu-latest)	29s
cargo test (windows-latest)	1m 19s
Run the fuzzers	2m 8s
Minimum Supported Rust Version (macOS-latest)	38s
Minimum Supported Rust Version (windows-latest)	56s
Code Coverage (windows-latest, windows)	3m 11s
	19m 58s

Provide feedback