in src/implementationGuides/index.ts [82:93]
private static isFhirStructureDefinition(x: any): x is FhirStructureDefinition {
return (
typeof x === 'object' &&
x &&
x.resourceType === 'StructureDefinition' &&
typeof x.url === 'string' &&
typeof x.name === 'string' &&
typeof x.description === 'string' &&
typeof x.baseDefinition === 'string' &&
typeof x.type === 'string'
);
}