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missing_capabilities

nichlink_run_method

Function missing_capabilities 

Source 
pub fn missing_capabilities(
    requirements: Vec<CapabilityRequirement>,
    declarations: &[CapabilityDeclaration],
) -> Vec<BuildDiagnostic>
Expand description

Every requirement whose ancestor chain offers no matching provider. 祖先链上找不到匹配提供者的全部需求，逐条生成诊断。