compilation_unit {
  package_statement {
    package_name: "ExplorerTest"
  }
  is_api: true
  declarations {
    variable {
      binding {
        name: "zero"
        type {
          expression_pattern {
            expression {
              int_type_literal {
              }
            }
          }
        }
      }
      initializer {
        int_literal {
          value: 0
        }
      }
    }
  }
  declarations {
    function {
      name {
        name: "Main"
      }
      param_pattern {
      }
      return_term {
        kind: Expression
        type {
          int_type_literal {
          }
        }
      }
      body {
        statements {
          return_expression_statement {
            expression {
              identifier {
                name: "zero"
              }
            }
          }
        }
      }
    }
  }
}