Inital from Sources of main:
KaNamedFunctionSymbol:
  anchorPsi: KtNamedFunction
  annotations: []
  callableId: /foo
  contextParameters: []
  contextReceivers: []
  contractEffects: []
  hasStableParameterNames: true
  isActual: false
  isBuiltinFunctionInvoke: false
  isCompanion: false
  isExpect: false
  isExtension: false
  isExternal: false
  isInfix: false
  isInline: false
  isOperator: false
  isOverride: false
  isStatic: false
  isSuspend: false
  isTailRec: false
  location: TOP_LEVEL
  modality: FINAL
  name: foo
  origin: SOURCE
  psi: KtNamedFunction
  realPsi: KtNamedFunction
  receiverParameter: null
  returnType: KaUsualClassType:
    annotations: []
    typeArguments: []
    type: kotlin/Unit
  typeParameters: []
  valueParameters: []
  visibility: PUBLIC

Restored in Sources of restoreInContextOf:
KaNamedFunctionSymbol:
  anchorPsi: KtNamedFunction
  annotations: []
  callableId: /foo
  contextParameters: []
  contextReceivers: []
  contractEffects: []
  hasStableParameterNames: true
  isActual: false
  isBuiltinFunctionInvoke: false
  isCompanion: false
  isExpect: false
  isExtension: false
  isExternal: false
  isInfix: false
  isInline: false
  isOperator: false
  isOverride: false
  isStatic: false
  isSuspend: false
  isTailRec: false
  location: TOP_LEVEL
  modality: FINAL
  name: foo
  origin: SOURCE
  psi: KtNamedFunction
  realPsi: KtNamedFunction
  receiverParameter: null
  returnType: KaUsualClassType:
    annotations: []
    typeArguments: []
    type: kotlin/Unit
  typeParameters: []
  valueParameters: []
  visibility: PUBLIC
