Implement `into_model` #63

Job	Run time
Prepare	5s
Docs - stable toolchain (recent)	23s
Integration tests - stable toolchain (26_0)	43s
Test - stable toolchain (minimal)	21s
Integration tests - stable toolchain (25_2)	41s
Integration tests - stable toolchain (25_1)	1m 22s
Test - stable toolchain (recent)	30s
Integration tests - stable toolchain (25_0)	29s
Integration tests - stable toolchain (24_2)	30s
Integration tests - stable toolchain (24_1)	59s
Integration tests - stable toolchain (24_0_1)	33s
Integration tests - stable toolchain (23_2)	30s
Integration tests - stable toolchain (23_1)	48s
Integration tests - stable toolchain (23_0)	31s
Integration tests - stable toolchain (22_1)	32s
Integration tests - stable toolchain (22_0)	30s
Integration tests - stable toolchain (0_21_2)	30s
Integration tests - stable toolchain (0_20_2)	46s
Integration tests - stable toolchain (0_19_1)	1m 31s
Integration tests - stable toolchain (0_18_1)	32s
Integration tests - stable toolchain (0_17_1)	38s
Lint - nightly toolchain (recent)	30s
Test - nightly toolchain (minimal)	50s
Docs - nightly toolchain (recent)	34s
Test - nightly toolchain (recent)	23s
	15m 41s

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