What's the usage of `belongsTo`

Align versions of modules using a published BOM

Importing Maven BOMs

what’s the different of using the complex way belongsTo and the simple way import

abstract class JacksonBomAlignmentRule implements ComponentMetadataRule {
    void execute(ComponentMetadataContext ctx) {
        ctx.details.with {
            if (id.group.startsWith("com.fasterxml.jackson")) {
                // declare that Jackson modules belong to the platform defined by the Jackson BOM
                belongsTo("com.fasterxml.jackson:jackson-bom:${id.version}", false)
            }
        }
    }
}

dependencies {
    components.all(JacksonBomAlignmentRule)
}
dependencies {
     api(platform("com.fasterxml.jackson:jackson-bom:${id.version}"))
}

get answer here. much more clear than the official doc.