metadata
metadata: {
layers: Record<string, null | number[][]>;
obs: Record<string, any>;
obsm: Record<string, null | number[][]>;
obsp: Record<string, null | number[][]>;
uns: Record<string, any>;
var: Record<string, any>;
varm: Record<string, null | number[][]>;
varp: Record<string, null | number[][]>;
X: null | number[][];
}